Robert Brown – discovered Brownian motion and first described the cell nucleus – autographOne of A Kind Collectibles LLC.$1,2005 days Left
Garibaldi (Giuseppe) Autograph letter signed ("G. Garibaldi") to Mr Thomas E. Nichols, LondonChiswick Auctions4.4(104)£200
Richard Bright – discoverer of Bright’s disease – 1831 ALS from Guy’s HospitalOne of A Kind Collectibles LLC.$225(2 bids)5 days Left
Hatch, H. F. Autograph Letter Signed (ALS) on Michigan State Prison Letterhead. Jackson, MI, 1889.Palmer's Auction Co4.6(110)$5Oct 21, 2026
1850 Providence Rhode Island to Boston Stampless Folded Letter Red CDS – Antebellum BusinessChan & Scott Auction House4.5(63)$10Sep 30, 2026
