1. Automatic Postal-Card and Envelope Distributer
2. Author unknown. “Crown Cases Reserved.” The Law Times (March 12, 1887).
3. Invention in 1889 A. D. vs. Invention B. C.
4. Author Unknown. “STATE OF BUSINESS: Processes of Recovery.” Time Magazine. 32, no. 12 (September 19, 1938).
5. Everitt, P., and J. G. Sandeman. “Apparatus for Automatically Delivering Prepaid Goods to Accord with the Price Paid Therefore”, US Patent No. 323, 213. July 28, 1885.