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This collection of contracts, patent assignments, other legal documents, and correspondence of Edison and others, deals with the development of the telegraph and the expansion of the telegraph network. There are 31 cataloged legal documents concerning his telegraphic patents, his company (Pope, Edison & Company), and its purchase by The Gold and Stock Telegraph Company in 1870. Other contracts concern the early work of Samuel F.B. Morse and other inventors, and later telegraph companies.

Correspondence, manuscripts, notes, memoranda, notebooks, notecards, proofs, photographs, microfilms, and printed materials. The Papers include the manuscript research materials and correspondence for each of his books except his biography of Theodore Dreiser. Among the correspondents are William Benton, Bruce Catton, Carey McWilliams, Mrs. Fremont Older (Cora Miranda Baggerly Older), and Thornton Wilder.

Correspondence, manuscripts, typescripts, contracts, legal briefs, patents, and other documents, music scores, cartoons, technical drawings, account books, blueprints, photographs, clippings, printed legal briefs & transcripts, proofs, scrapbooks, and other printed materials of William M. Speer.