The Wayback Machine - https://web.archive.org/web/20230314132341/https://about.usps.com/who/profile/history/moving-mail.htm
- Steamboats PDF | HTM
- Mail by Rail PDF | RTF
- Star Routes PDF | RTF
- Overland Mail to California in the 1850s PDF | HTM
- Pony Express PDF | RTF
- Airmail: A Brief History PDF | RTF
- Airmail History in Pictures, 1918–1928 PDF | RTF
- Airmail Pilot William C. Hopson PDF | RTF
- Airmail Route Maps, 1918–1955 PDF | RTF
- List of Airmail Pilots Employed by the Post Office Department PDF | RTF
- Standard JR-1B Plane #1 PDF | RTF
- Unusual Delivery Methods
- Vehicles
- Electric Vehicles in the Postal Service PDF | RTF
- When Motorcycles Moved the Mail PDF | RTF