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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.

Keystone View Company Inspecting a Nearly Completed Pontoon Bridge in the French Sector of the West Front

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Gilder Lehrman Collection #: GLC09584.024 Author/Creator: Keystone View Company Place Written: s.l. Type: Stereocard Date: 1914 Pagination: 1 stereocard Height: 8.7 cm, Width: 17.7 cm Order a Copy

On a river in France, inspecting officers walk across a constructed pontoon bridge flanked by pontoon boats each carrying three soldiers.

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