Collection
- Henry Bourne Joy Papers, 1883-19371
- Herman Lunden Papers, 1896-19291
- Hinsdale family papers, 1857-19631
- Howard Cyrus Lawrence Papers, 1916-19661
- John G. Parkhurst papers, 1802-19141
- John Wesley Longyear Papers, 1837-18751
- Joseph C. Satterthwaite business records, 1844-18721
- Louis Sands Salt and Lumber Company (Manistee, Mich.) records, 1863-19321
- Lucy E. Chapin papers, 1834-19101
- Mary Shurtleff collection, 1848-1915 (scattered dates)1
- Michigan Central Railroad Company records, 1837-1990 (majority within 1837-1928)1
- Mitchell and McClure Lumber Company records, 1866-19281
- Morgan Family Papers, 1821-18931
- Morley Brothers (firm: Saginaw, Mich.) Papers, Series 4, Oversized Volumes, 1835, 1967, and undated1
- Penn Central Transportation Company Records, 1835-1981 (majority within 1835-1960)1
- Peter Barbeau papers, 1789-19091
- Phelps Brothers (Manton, Mich.) records, 1890-19641
- Postum Company records, 1895-19311
- Rice Aner Beal papers, 1843-18831
- Robert D. Aldrich Collection, 1783-19831