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File consists of a statement of Gold Operators (Canada) Ltd.'s bank account at Bankers Trust Company, February 1936; receipts for reimbursement by Gold Operators to Robert Hoffman for his business expenses; and a handwritten list of payments made to Robert Hoffman, December 1936.

File consists of: clippings about copper mining in the Belgian Congo and Rhodesia, 1929; a memo regarding manganese deposits in South Africa, 1929; a map of the main roads crossing Africa, undated; and a report on the 'Vlakpontein nickel deposits' in the Transvaal, South Africa, written by Robert Hoffman in 1930. The report includes a history of the region, the location of the nickel deposits and a geological study.

File consists of records: related to Algood Gold Mines Ltd., including a shareholders report by the president A.K. Roberts, March 1954; a balance sheet of its assets, December, 1954; and a notice of a general meeting, March 1955. File also contains an unrelated reimbursement receipt issued to Robert Hoffman by Gold Operators (Canada) Ltd., July 1938.

Fonds consists of the records created and accumulated by Arnold Hoffman as a prospector and stockholder, relating to gold mining operations in Ontario, Quebec, and the Northwest Territories. Records relating to the gold mines at Wright-Rouyn, Arrowhead, and Thompson-Lundmark include: maps and sketches, photographs, geological studies, reports, and assay reports. Files also contain records pertaining to Stadacona Rouyn, Sunset Yellowknife, Junior Frood, Coniaurum, Algood, Pershon, Resenor, Michipicoten, Croydon Rouyn, and El Canada mines, including geological reports, and correspondence. Records related to Hoffman’s stocks and business operations as Secretary of Gold Operators (Canada) Ltd. include stockholder lists, securities lists, annual reports, meeting minutes, correspondence, newspaper clippings, cheques, and contracts.

File consists of geological reports on the Arrowhead property completed by Robert Hoffman, H.M. Butterfield, W. F. James, and Donald J. Russell. File includes vertical cross-sectional diagrams depicting the "A" vein and the "B" vein of the Arrowhead gold mine. The diagrams indicate sample locations.

File consists of Arrowhead's monthly mine statements, including summaries of operations, debits and credits, inventory purchases, and account statements, April to May 1936.

File consists of an inventory of commodities at Arrowhead Gold Mines Ltd.

File consists of assay reports which include physical descriptions of samples taken from Arrowhead gold mines.

File consists of assay reports and physical descriptions of samples taken from Arrowhead gold mines.

File consists of: newspaper clippings related to Pershon, Arrowhead, and Wright-Rouyn; an informational circular on Arrowhead Gold Mines Ltd., which includes a map of the property; a report on Pershon gold mines' property, written by Robert Hoffman in 1945; and a copy of a bankruptcy notice, describing the insolvency of Arrowhead Consolidated Mines Ltd.,1932. File also contain an unrelated note likely added by a subsequent custodian.

File consists of records pertaining to the securities of Gold Operators (Canada) Ltd., including account statements, receipts, and correspondence, from A.E. Ames & Co. Incorporated Investment Securities, Imperial Bank of Canada, J.R. Timmins & Co., R.A. Hutchison & Co. Barrett, Sequin & Co., Tom & Barnt; Earl M. Robertson & Co., J.R. Stratton & Co., Duncanson, White, & Co. and Dan Cushing, Ltd. File also includes correspondence with the Doodad Prospecting Syndicate regarding the purchase of units.

File consists of correspondence related to the Brownell Exploration Group, a syndicate which comprised of a group of claims in Joannes Township, Quebec. Primarily includes correspondence between Robert Hoffman and George F. Brownell, regarding exploration of Rouyn, Quebec and a zinc deposit near Kingston, Ontario, 1924-1926; correspondence between Brownell, Hoffman, and Olaf Boe, of Norway, regarding the Brownell Exploration group; memos of work done in the Joannes Township in 1924; and a hand-drawn sketch which illustrates the Wright-Hargreaves mine, near Kirkland Lake, Ontario, undated.

File consists of records relating to Gold Operators, Inc., including the minutes of its first meeting on 9 October 1933, the minutes of a special meeting of its board of directors in 1934, and a copy of its by-laws.

File consists of records relating to the founding of Gold Operators (Canada) Ltd. These include a copy of the letters patent which incorporated the company in Toronto on 3 September 1936 and a copy of the company's by-laws.

File consists of meeting minutes of the directors and shareholders of Gold Operators (Canada) Limited from September 1936, October 1936, January 1937, March 1937, April 1940, April 1945, and April 1948. File also contains miscellaneous correspondence, including letters from John and Katherine Churchill (formerly Canfield), regarding the transfer of stocks to Cass Canfield.

File consists of correspondence with Cass Canfield regarding the transfer of 800 shares of Gold Operators (Canada) Ltd. The shares were purchased in Katherine Canfield's name in 1936 and transferred to Cass Canfield in 1938, following their divorce.

File consists of correspondence and cheques sent to Gold Operators (Canada) Ltd. from Carret, Gammons & Co., an Investment Securities company based in New York.

File consists of: photographs and newspaper clippings related to the gold mining industry in Canada; a geological map of Cadillac-Bourlamaque, Abitibi County, Quebec, 1943; a notebook with comments recorded during staking of Wright-Rouyn, 1946; and correspondence related to Arrowhead mines, 1929.

File consists of photographs and newspaper clippings related to Arrowhead gold mines.

File consists of records relating to the Coniaurum mines near Porcupine, Ontario, and the El Canada Colombia Mines Company, which employed Robert Hoffman as a consulting engineer in 1952. File includes correspondence regarding the development of the Coniaurum and El Canada mines; a map of the El Canada mines in Túquerres, Nariño, Colombia; seven vertical cross-sectional drawings of the Coniaurum mines; meeting minutes of El Canada Colombia Mines Company, December 1952; the "Austin Report" on El Canada Mines, written by J.W. Austin in 1929, likely collected by Hoffman after 1934; and a metallurgical report on the gold-bearing ores at El Canada mines, written by E.J. Maust in 1934.

File consists of letters of correspondence between Robert Hoffman, Charles Wright, and Wright-Rouyn Gold Ltd.

File consists of a book of field notes made by Robert Hoffman of Croydon Rouyn mines and a drawing of the Croydon Rouyn mining claim.

File consists of correspondence with E.K. Fockler, mining geologist at Croydon-Rouyn Mines Ltd. Correspondence includes geological reports and typed copies of drill logs.

File consists of: records pertaining to the staking of Croydon Rouyn mines, including Robert Hoffman's notebook, 1943; correspondence related to the stakings; a transport of mining rights contract signed by Robert Hoffman, undated; a colour map of the Rouyn district; a drawing of the Wright Rouyn Gold Limited assay plan; and two sketches of the area.

File consists of: correspondence pertaining to Croydon Rouyn Mines Limited; informational bulletins describing the mining properties of Croydon Rouyn Mines Limited, near Rouyn, Noranda, Quebec; newspaper clipping; a geological map of Northern Sierra Nevada in central California, USA; and a copy of a legal agreement between Lanfear B. Norrie and Verona Rock Products Limited, April 1945.

File consists of correspondence with Donald J. Russell, mining engineer at Arrowhead mine. Correspondence reveals technical details about the Arrowhead mine including assay reports and daily reports on its progress.

File consists of correspondence with Duncanson, White & Co., regarding the Arrowhead gold mine and its stocks.

File consists of correspondence with George Radisics, a geologist and miner based in Yellowknife, Northwest Territories, manager of Slemon Yellowknife Mines Limited. File also includes a map of southwestern Rouyn, Quebec, two drawings of claims in the Northwest Territories, and a drawing of drill holes in Slemon Yellowknife Mines.

File consists of correspondence and a receipt for the purchase of 1,200 shares of Frederick Yellowknife Mines Ltd. stock by Gold Operators (Canada) Ltd., 1946.

File consists of the prospectus of Gold Operators Inc., released 2 November 1933.

File consists of a typed document describing the history of the Thompson-Lundmark gold mine located near Thompson Lake, Northwest Territories. The document gives an account of the discovery of gold in the area and the development of the mine. Several illustrations are included: vertical cross sections diagrams of the mine, an illustration of a pumping system used to dewater a mine shaft, and a flow sheet which describes the stages of the gold mining process.

File consists of correspondence between Gold Operators (Canada) Ltd. and the Imperial Bank of Canada. The letters describe the mining company's stockholdings and securities.

File consist of annual lists of securities held for safekeeping for Gold Operators (Canada) Ltd. by the Imperial Bank of Canada.

File consists of a proposal by Ingersoll-Rand Company to supply Arrowhead Consolidated Mines, Ltd. with an air compressor plant, with drilling, sharpener, hoisting, mine car, and pumping equipment. The proposal includes illustrations, cost breakdowns, and detailed descriptions of the air compressor plant.

File consists of records relating to the development of the Irving Hoffman claims at Pelletier Lake, Quebec, which were purchased by the Canadian Mines Development Syndicate in November 1928. Records include: a memo which details a payment plan between Canadian Mines Development Syndicate and the Eastham Co. in 1929; a report of work sent to the Department of Colonization, Mines and Fisheries in Quebec which details the prospecting of the claim in May 1924; correspondence relating to the claim and its stock; and eight newspaper clippings.

File consists of correspondence to J.D. Seguin of Arrowhead Gold Mines Ltd.

File consists of: photographs depicting mining structures, log cabins, camps, and drill holes; newspaper clippings about the Arrowhead mines; correspondence regarding the Joanne Syndicate, 1930-1932; drawings of a mine held by Masara Consolidated Mines Corp.; payment agreements from Masara Consolidated Mines Corp.; and cheques to Gold Operators (Canada) Ltd.

File consists of correspondence pertaining to the Junior Frood Mine in Sudbury, Ontario and the associated mining company, Junior Frood Mines Ltd. Arnold Hoffman purchased shares in Junior Frood Mines Ltd., entered a voting trust agreement to serve as trustee of the company in 1935, and oversaw a transfer of 35,000 shares to Gold Operators (Canada) Ltd. in 1944.

File consists of two letters to John Costello to Robert Hoffman, relating to the development of mines near Larder Lake, Ontario, 1943, and two hand-written notes, entitled "Gold Mining Finance" and "Episode of Kaplan Oaks," which were likely early drafts of sections of Hoffman's book, Free Gold: The Story of Canadian Mining.

File consists of vertical cross-sectional drawings depicting the "A" vein of the Arrowhead gold mine. The drawings indicate sample locations.

File consists of records related to the liquidation of the Masara Consolidated Mines Corp.

File consists of an agreement between Arnold Hoffman and Masara Consolidated Mines Corp., wherein Masara Consolidated Mines Corp. agreed to advance payments to Hoffman over four months.

File consists of memos written by Arnold Hoffman regarding Arrowhead gold mines.

File consists of correspondence with Alan C. Lee, mining engineer at Pershon Gold Mines Ltd. The letters reveal the mine's progress and include assay reports, 1945-1946. The file also includes an unrelated file: typed pages titled "Diary of R.D. Hoffman" which include physical and technical descriptions of Coniaurum mine, 1935.

File consists of assay reports, drill logs, and physical descriptions of samples taken from Pershon gold mines, near Noranda Quebec. File also contains an unrelated map of El Canada Mines in Colombia, depicting relationship between Quatorce and Upper Mosces workings, 1952.

File consists of two pieces of correspondence from Robert Hoffman addressed to Donald J. Russell and J. Dumaresq Smith, regarding the need and costs of drilling equipment for Pershon mines. File also contain an unrelated note likely added by a subsequent custodian.

File consists of a financial statement of Pershon Gold Mines Ltd., telegram notes regarding stock purchases, and two letters between Alan C. Lee, Robert Hoffman, and Pershon Gold Mines Ltd.

File consists of records related to a proposal to develop a road which would service mines in the Pershing region, near Lac Gueguen and Lac Vauquelin, Quebec. J.J. Mining proposed that Pershon Gold Mines Ltd. contribute funds for the road, to which Robert Hoffman declined. Files include correspondence pertaining to the issue and a map showing the proposed road.

File consists of several spreadsheets, typed and handwritten, detailing expenditures on air travel by Thompson-Lundmark Gold Mines Ltd. in 1948. The file also contains the renewal statement of a mortgage between A.L. Guest and Gold Operators (Canada) Ltd., 1946.

File consists of correspondence with Quincy A. Shaw Jr., a mining executive from Boston, Massachusetts, related to mining partnerships and investments, with particular emphasis on the Irwin Hoffman claim in Wright-Rouyn, Quebec.

File consists of several reports made regarding Arrowhead Gold Mines. These include: vertical cross-sectional drawings of Arrowhead Gold Mines, indicating where assay samples have been taken, April 1936; a notice of sale of Arrowhead Consolidated Mines, Limited, October 1932; two sketches of sampling plans; a report from the Brownell Exploration Group on Joannes Township Quebec, 1929; an assay report on Arrowhead gold mine, January 1936; two reports on Arrowhead gold mine by the Mining Evaluation Company, August 1936, July 1937; and a letter from Robert and Arnold Hoffman to Duncanson, White & Co. describing drilling on Arrowhead, August 1936.

File consists of annual reports of Gold Operators (Canada) Ltd. The reports were distributed to the company's shareholders at its annual general meetings. The reports provide financial information about the company's holdings and describe the status of the mines in which Gold Operators (Canada) Ltd. had investments.

File consists of geological reports of mining prospects in New Brunswick, including a physical description of an arseno-pyrite deposit near Beresford, Gloucester County, and a report on Adams Island in Charlotte County by Captain J.G. Ross, consulting mining engineer, in 1928. File also includes correspondence and sketches related to "Roger Farm," likely in New Brunswick, 1929; six sketches of a mine labelled 'Paramo'; and two sketches of a mine labelled "Upper Mosces," undated.

Files consist of records related to the purchase of Resenor Gold Mines Ltd. stock by Gold Operators (Canada) Ltd.

File consists of maps of Thompson-Lundmark Mines, near Thompson Lake, Northwest Territories, and correspondence with Hoffman's attorneys regarding an Attorneys agreement between co-owners of mineral claims, including Arnold Hoffman and Frederick W. Thompson, 1946. The correspondence reveals the distribution of shares among co-owners of Gold Operators (Canada) Ltd. and details about its financial assets. File also includes a notebook created by Arnold Hoffman which consists of notes and sketches taken during his staking of the Irwin Hoffman claim in Rouyn, Quebec in 1929.

File consists of correspondence relating to the unsuccessful Hoffman-Russell Molybdenum Syndicate. The syndicate was created in 1939 to investigate cobalt and molybdenite deposits near Cobalt, Ontario and was dissolved in 1941 due to poor war-time financial conditions.

File consists of two lists which detail the names and number of shares of all stockholders of Gold Operators Inc. in 1935 and 1936. and correspondence between Robert and Arnold Hoffman and several stockholders.

File consists of records relating to Gold Operators, Inc. and the Securities and Exchange Commission in Washington, D.C. The file includes a copy of the Securities Act enacted by the U.S. Congress in 1933 and a questionnaire requested by the Securities and Exchange Commission, completed by Arnold Hoffman.

File consists of correspondence with John Stadler, a consulting engineer who purchased Arrowhead Gold Mines Ltd. following its bankruptcy in 1936.

File consists of records which give an overview of the financial assets of Gold Operators Inc., including the company's cash on hand, stock assets, advances, and expenditures. Records include balance sheets of Gold Operators Inc., income account reports, and a memo for a stockholders meeting held in February 1934.

File consists of correspondence with L.L. Steindler, a New York-based investor.

File consists of correspondence related to Sunset Yellowknife mines in the Northwest Territories, predominantly addressed to Fred W. Thomson, President of Sunset Yellowknife until 1950. Correspondence also includes some geological reports and assays. File contains two lists of shareholders, 1945-1946. Fred W. Thomspon, Robert Hoffman and Arnold Hoffman resigned from Sunset Yellowknife Mines Limited in 1950, but they retained substantial shares in the company as directors of the Thompson Prospecting Syndicate, which held 700,000 shares in 1945 and 500,000 in 1946.

File consists of records related to stock purchases and investments of Syndicate Options Ltd. including legal agreements, ledger account balances, stockholders lists, and correspondence.

File consists of records related to Syndicate Options Ltd. including the signed syndicate agreement, 1936, reports on the financial assets of Syndicate Options Ltd., and correspondence related to trade and transfer of stock.

File consists of correspondence with Fennell, Porter & Davis, barristers and solicitors, regarding Syndicate Options Limited, an agreement wherein, Duncanson White & Co. purchased 300,000 shares of Arrowhead Gold Mines Ltd. from Syndicate Options Limited, May 1936, and a copy of the Syndicate Agreement creating Syndicate Options Ltd. in April 1936.

File consists of: records which relate to the purchase of 5,000 shares of Michipicoten Gold Mines Ltd. by Gold Operators (Canada) Ltd. in 1935. Records include correspondence with F.W. Thompson; an advertisement bulletin recommending Michipicoten Gold Mines Ltd. stock, 1938; and a letter addressed to shareholders from J.J. Miller and Company, General Investment and Brokerage Business, describing the promising results of bulk samples taken at Michipicoten, 1938.

File consists of correspondence with F.W. Thompson.

File consists of expense receipts for two trips made by A. L. Guest to Yellowknife, Northwest Territories, and Edmonton, Alberta in 1948.

File consists of correspondence with P.A. Thompson, a Montreal-based mining investor and partner of Quincy A. Shaw Jr.

File consists of records related to the transfer of shares from Thompson-Lundmark Gold Mines Ltd. to Gold Operators (Canada) Ltd.

File consists of diagrams depicting the assay plans of several veins and diamond drill holes at Thompson-Lundmark Gold Mines Ltd., 1949. File also contains a flow chart depicting the monthly average number of employed workers, 1949; lists of shareholders, 1938 and undated; balance sheets; expense and account reports devised by Robert Hoffman, 1949; and correspondence and notes related to Thompson-Lundmark Gold Mines Ltd.

File consists of drill logs sent to Robert Hoffman by D.R. Wilson, the manager of Thompson-Lundmark Gold Mines Limited, 1949; and the prospectus of Thompson-Lundmark Gold Mines Limited, which names Arnold Hoffman as a mining executive and director of the company, 1938.

File consists of the journal notes, telegrams, and sketches made by Robert Hoffman. Several telegrams and notes are written in code and deciphered. File includes a map of the Waco claims near Thompson Lake, Northwest Territories, and unlabeled drawings of mine shafts.

File consists of correspondence with F.W. Thompson regarding Thompson-Lundmark gold mines.

File consists of financial data, gold production, and stockholder lists of El Canada Colombia Mines Company, 1952; correspondence between George F. Brownell and Robert Hoffman regarding the Brownell Exploration, 1925-1926; 2 maps of Giant Yellowknife Gold Mines, near Yellowknife Bay in the Northwest Territories; a list of securities held in safekeeping for Gold Operators (Canada) Ltd., by the Imperial Bank of Canada, 1940; and a balance sheet detailing the assets of the Towne Securities Corp, 1952.

File consists of records collected by Arnold Hoffman as treasurer, related to sales of Gold Operators (Canada) Ltd. and Thompson-Lundmark Gold Mines Ltd. stock in 1946. The file also contains a memo and associated materials regarding the estimated earnings of Coniaurum mines 1934; two drawings of drill holes on a Hoffman claim, and a Shaw-Hoffman claim in Rouyn township, Quebec, 1931; and a published report by the Province of Quebec, Department of Labour, Mines, and Maritime Fisheries, entitled "Mining Properties and Development Work in the Abitibi and Temiscamingue Counties," 1939.

File consists of correspondence with Everett Bristol and one letter from Quincy A. Shaw. The letters pertain to a misunderstanding about payments between the Haras Corporation and Wright Rouyn Gold Limited.

File consists of correspondence between Arnold Hoffman and Colonel Thain W. MacDowell, the president of Wright Rouyn Gold Ltd. The correspondence predominantly deals with the development of the Wright Rouyn and Stadacona gold mines. Several letters reference early events of World War II, including Neville Chamberlain's appeasement policy and the beginning of the Adriatic Campaign in 1939.

File consists of: records related to the Wright-Rouyn gold mine near Noranda, Quebec. Records include, a longitudinal cross-sectional drawing of Stadacona mines, which are northeast of Wright-Rouyn; a memo about the progress of the mines; newspaper clippings; a map of the Irwin Hoffman claim at Wright-Rouyn, an assay report; correspondence with H.M. Butterfield, consulting geologist; a balance sheet from end-of-year, 1945; and a notebook sketch of a cross-section of the mine.

File consists of correspondence between Arnold Hoffman and Fennell, Porter, McLean, & Davis, a law firm representing Gold Operators (Canada) Ltd. The subjects of the correspondence are taxes and stock transfers related to Wright Rouyn Gold Mines Limited. File also includes the minutes from two Wright Rouyn Gold Limited directors meetings, 22 February 1946 and 19 November, 1945.

File consists of correspondence with Fred W. Thompson regarding his purchase of Wright-Rouyn Gold Mines Ltd. shares.

File consists of records related to a transaction between Gold Operators (Canada) Ltd. and Haras Corporation wherein Gold Operators (Canada) Ltd. paid $500 for 4,000 shares of Wright Rouyn Gold Mines Ltd. stock in 1939.

File consists of: notes from a journal, 1946; assay reports from Wright-Rouyn; newspaper clippings; five vertical cross-sectional drawing of drill holes at Shaw-Hoffman claim; bound collection of geological Reports on Irwin Hoffman claim, written by Arnold Hoffman, Howard J. Jewell, W.W. Beaton, and J.S. Stratton, 1931, 1935, 1937; three maps of Rouyn and Joannes Townships, Quebec; and a map showing location of diamond drill holes on Hoffman claim, 1931.

File consists of correspondence with J. Bradley Streit.

File consists of correspondence and a map of Rouyn, Quebec.

File consists of maps and drawings related to Wright-Rouyn mines, including: two maps of Stadacona Rouyn mines and a proposed Wright-Rouyn extension, undated; map of Wright-Rouyn mines, 1939; a map with copies depicting a proposed boundary change, 1940; a drawing showing the relationship between vein outcrops, trenches, and diamond drill holes; two maps depicting mining claims in Township of Rouyn, Quebec, 1939; and a sketch depicting proposed diamond drill holes at Wright-Rouyn, undated. File also includes: memos regarding diamond drill holes, 1944-1945; a report by Robert Hoffman, undated; newspaper clippings; and a balance sheet listing Wright-Rouyn's assets and liabilities, 1946.

File consists of: a vertical cross sectional drawing of planned drilling holes at Wright-Rouyn; physical descriptions of samples taken from Wright-Rouyn; a cost breakdown of expenses accumulated between February 1939 and December 1946; and progress reports sent by H.M. Butterfield, a consulting geologist.