- Postal Laws and Regulations – 1859 – (courtesy Steven M. Roth)
- US Register of Officers and Agents – 1861
- List of US Post Offices – 1862 – (courtesy Theron Wierenga)
- 1859 – Report of the PMG
- 1860 – Report of the PMG
- 1861 – Report of the PMG
- 1862 – Report of the PMG
- 1863 – Report of the PMG
- 1864 – Report of the PMG
- 1865 – Report of the PMG
- 1866 – Report of the PMG
- 1867 – Report of the PMG