The collection consists of biographical materials, including a handwritten biographical memoir of Theodore Judah, possibly by Anna, business and personal letters to the Judah, business documents, materials pertaining to the California Eastern Extension Railroad, ephemera relating to the family, portraits of Theodore D. Judah, and books from his library.

Theodore Dehone Judah was born in Bridgeport, Connecticut, on March 1, 1826. He studied at Rennselear Polytechnic Institute and entered the engineering profession, working on a number of eastern railroads. While employed as engineer for the Buffalo, New York and Erie Railroad, he became acquainted with Colonel Charles L. Wilson, who offered him a position as chief engineer with the Sacramento Valley Railroad in California.

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