The Hidalgo Copper Mining & Smelting Company

This company was located in Zimapán, 122 kilometres north-west of Pachuca and 144 kilometres east of Querétaro. In 1902 the Ludlow brothers discovered that copper existed at Zimapan and the Ludloe-Armstrong company acquired many of the properties there^{The Mexican Herald, 12 January 1908}.
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In October 1907 all of the Ludlow-Armstrong properties at Zimapam were put into the Hidalgo Copper Mining and Smelting company, capitalised at $,2,000,000 gold. The mines taken over included twenty-two producing properties, nine leased producing properties, and five virgin properties. The company also owned and operated a twenty-five ton lead-silver smelter and a thirty ton silver-copper smelter at Zimapan^{The Mexican Herald, 17 October 1907}. The brothers controlled the company and its president and general manager was Sydney Ludlow.

All the notes are from June 1915 and unsigned/unissued.

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