Letters of Hoffman to his family. There are seventeen letters to his niece, Matilda Nicholas Whitman, and one letter to his half-sister, Ann Hoffman Nicholas. The correspondence deals with the literary and social life in New York and with the Hoffman family. Two of the letters have notes added by his father, Josiah Ogden Hoffman. Also, an engraved portrait of Charles Fenno Hoffman.

Letters written to James Ripley Wellman Hitchcock, to Mrs. Hitchcock, and to Richard Henry Stoddard from various people in literary artistic and dramatic circles, mainly of New York. There are letters and documents relating to Hitchcock's early life, photographs, a group of materials relating to the American Art Alliance in which Mrs. Hitchcock was interested, and a group of miscellaneous papers and letters relating to the publication, dramatization, filming, and radio rights of Edward N. Westcott's DAVID HARUM which Mr. Hitchcock was instrumental in having published. Also, manuscripts and printed versions of Charles Chapin Sargent, Jr.'s (brother of Hitchcock's second wife, Helen Sargent Hitchcock) writings including short stories and a libretto for an operetta "Cleopatra" written for the Columbia College Musical Society in 1897, two scrapbooks containing mementos of his college years, two pictures, and a Columbia College diploma.