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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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3 May 1860

Treadwill, A. B., fl. 1860

Autograph document signed

Title: Teaching Certification

This is to certify that Charles B Porter his examination and is able to give instruction for two years in Newton, Michigan.

GLC02172.01