Includes: an invoice and letters on Hammond Typewriter Company letterhead and illustrations, envelopes with varying Hammond typewriter company logos and depictions of Hammond typewriters, John Pratt the inventor of the Hammond typewriter postcard photograph, Hammond exhibition booth and factory in New York City postcards, Hammond logo and illustrations stamps, Hammond typewriters models 2 and 12 photocopied user manual, Hammond typewriters trade cards, Multiplex Hammond and all models of Hammond typewriters user manuals, standard and portable Hammond price list, "Little Journeys to Homes of Gret Scientists" booklet, "Tyndall" with an advertisement for a Hammond typewriter in the front matter, Hammond typewriter order form , a keyboard diagram, Hammond typewriter trade catalog, Multiplex trade catalog, Hammond typewriter supplies pamphlet, instructions for adjusting the Multiplex Hammond, stencil work on a Hammond multiplex instructions, making copies on a Hammond typewriter instructions, and a business card.