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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.

Unknown [Profile of a 5-inch shell]

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Gilder Lehrman Collection #: GLC02437.09978 Author/Creator: Unknown Place Written: s.l. Type: Manuscript document Date: 1781 Pagination: 1 p. : docket ; 22.8 x 20 cm. Order a Copy

Drawn diagram of the profile of a 5-inch shell. Includes a scale and various measurements. Date written later in pencil. Possibly docketed by Knox.

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