Autograph letter signed, handwritten in black ink on unlined paper with a self-envelope, postmark, and remnants of a wax seal. "New York Saturday the 28th [that is, 29th] of August 1807"--Page 1.
Autograph letter signed "Boulton Watt & Co.," identified as being in the hand of James Watt, Jr., to Robert Fulton (using the alias Robert Francis), with scale drawings of a steamboat engine in color.