Subjects
- Maps (documents)10
- Maps.2
- Medicine - Health and Medical Schools 1850's.1
- Medicine. SEE ALSO Folk medicine.1
- Mexican War, 1846-18481
- Military campaigns1
- Military camps1
- Mills and mill-work4
- Mining. SEE ALSO Coal mining.1
- Ministers - letters and papers.1
- Missionaries1
- Monongah Mines Disaster, Monongah, W. Va., 19071
- Monongahela, Battle of the, Pa., 17551