William H. H. Hinds, 19th Century Dentist, Inventor, Writer, and Clever Promotor.

William H. H. Hinds used a "letter sheet" to advertise his dental services in Ayer, Massachusetts in the early 1880s. This letter sheet is an excellent example of a dentist using the United States Postal Service for educational and promotional purposes in the 19th century. Dr. Hinds's letter sheet is shown and his biographical summary presented.