Our Collection

At the Institute’s core is the Gilder Lehrman Collection, one of the great archives in American history. More than 85,000 items cover five hundred years of American history, from Columbus’s 1493 letter describing the New World through the end of the twentieth century.

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20 June 1792

Monvel, fl. 1792

Manuscript letter signed

Title: to Henry Knox

Monsieur Monvel discusses a visit to Thomaston, Maine. Reports his findings in detail, noting the geological features of the area. Mentions limestone, granite, quartz, mica, ore, and other rock formations as well as the surrounding land features.

GLC02437.05513

23 July 1792

Monvel, fl. 1792

Autograph letter signed

Title: to Henry Knox

Informs Knox of his findings concerning the lay of the land and waterways and mineral deposits, namely iron, in Maine. Notes that he will next be surveying the area of Pleasant Mountain, Maine.

GLC02437.05555

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