Our Collection

At the Institute’s core is the Gilder Lehrman Collection, one of the great archives in American history. More than 70,000 items cover five hundred years of American history, from Columbus’s 1493 letter describing the New World to soldiers’ letters from World War II and Vietnam. Explore primary sources, visit exhibitions in person or online, or bring your class on a field trip.

Unknown [Cost estimates to dig a canal]

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Gilder Lehrman Collection #: GLC02437.08440 Author/Creator: Unknown Place Written: s.l. Type: Manuscript document Date: circa 1790 Pagination: 1 p. ; 10.1 x 19.3 cm.

Estimates labor costs to build a 90 mile canal with 60 locks at "386.400" dollars. Estimates it would take 1,000 men about 2 years to complete.

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