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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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Gilder Lehrman Collection #: GLC02437.08194 Author/Creator: Place Written: s.l. Type: Manuscript document signed Date: circa 1790-1820 Pagination: 1 p. : Height: 31.1 cm, Width: 19.6 cm Order a Copy

Lists the calculations for the expenses of creating a lock made of timber and the expenses for a canal.

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