From "GUNMAKERS OF ILLINOIS" by Curtis L. Johnson Vol 1 Page 156: DONN, WILLIAM - Canton, Fulton Co. 1870-1900 Peoria, Peoria Co. 1886-1888. A brother of noted Canton gunmaker James Donn, William is listed as a gunsmith in the 1870 census. He was 24 years old, born in Illinois and was at that time employed by his brother James. In 1873 James and William becames partners, a business relationship that..ended in 1900. During that time William was primarily involved with merchandising. At the time of his brother's death in 1911 William was a resident of Chicago.