Handwritten correspondence written between 1813-1824. Contains letters sent between Joseph Delaplaine and popular American figures of the early nineteenth century. The majority of items concern information for Delaplaine's book, "Repository of the Lives and Portraits of Distinguished Americans." Includes handwritten autobiographical sketches of Oliver Wolcott Sr. and William Pinkney and letters from prominent political figures such as William Henry Harrison and Richard Mentor Johnson.

Photocopy of a handwritten letter dated 16 Jan. 1854 and addressed to Lucy Mack Smith (1775-1856), mother of the Joseph Smith (1805-1844) who was the first president of the Mormon Church. Pratt writes from Washington, DC and informs Smith that he has purchased some manuscripts and refers to his attempts to get a book published relating to the Mormons.

Typewritten and handwritten correspondence, brochures, and galley proofs for publications. The correspondence is chiefly with Fred A. Rosenstock of Denver, Colorado and deal with matters relating to the purchasing of rare books. The brochures and galley proofs relate to rare books that were being offered for sale by various dealers.