- M. G. Comuntzis Obituary, 19891
- M. Gillett botanical plates, 18381
- M. H. Achord American Civil War Reminiscences Collection, 1926/19272
- M. J. McConnell and Son Ledger,
1914-19171
- M. J. Meyerhoeffer Journals, 1858/18623
- M. L. Barker's Art album of Pin Pricking, 19001
- M. L. Foley Collection,, 1958/19643
- M. M. Cottingim Diary,, 18622
- M. M. Tankersley Papers, 1878/1910, bulk 1878/188525
- M. Patton Echols papers,
1970-197234
- M. Rosaria Piomelli Architectural Collection, 1960/199561
- M. Rupert Cutler Papers, 1930/2021, bulk 1962/20214,187
- M. Strickler Letters, 18643
- M. Sydenstricker Letter, 18652
- M. T. Norman Letter, 18642