- Postal Laws and Regulations
- Postal Laws and Regulations – 1859 – (courtesy Steven M. Roth)
- Postmaster General’s Instructions on implementing the Acts of 27 Feb 1861, 3 Mar 1863, 1 Jul 1864, and 3 Mar 1865 – (Courtesy Theron Wierenga)
- Post Office Lists
- US Register of Officers and Agents – 1861
- List of US Post Offices – 1862 – (courtesy Theron Wierenga)
- Reports of the Postmaster General