Collection
- Lyman Trumbull family papers, 1799-1924 (majority within 1859-1890)1
- Lyman Wheeler diaries, 1852-18551
- M. Robert Rosenberg letters, 1943-19441
- Mamie P. Schultz notebook, 18911
- Manuscript Sheet Music collection, 1801-1923 (majority within 1850s-1890s)1
- Marge Piercy Papers, 1958-2004 (majority within 1966-2003)1
- Maria Marsh hair album, 1850-18531
- Marianna C. Lanman Penmanship and Mathematics Exercise Books, 18141
- Marie Duncan letters, 1919-19211
- Martha Leach Packard commonplace book, 1837-1894 (majority within 1853-1862)1
- Mary Jane Daggett family collection, 1853-18761
- Mary Wait and Alden Scovel collection, 1820-18881
- Maryann B. Clark hair album, 18521
- Mathewson family collection, 1796-18401
- McViccar-Antes collection, 1802-19161
- Montgomery (N.Y.) Young commonplace book, 1821-18311
- Montgomery collection, [1769], 1774-17751
- Moody Kent collection, 1771-1912 (majority within 1798-1860)1
- Morris County (N.J.) Woman's collection, 1815-18201
- Moses A. Cleveland collection, 1864-1917 (majority within 1864-1892)1