Collections referenced in various posts, with links to repositories and finding aids (where available).

American Philosophical Society

Britton Chance Papers, Mss.Ms.Coll.160
John Fries Frazer Papers, Mss.B.F865
Persifor Frazer Papers, Mss.B.F867
Grand Trunk Pacific Railway, Mss.SMs.13
Alfred Irving Hallowell Papers, Mss.Ms.Coll.26
Isaac and I. Minis Hays Papers, Mss.B.H334
Sir Joseph Dalton Hooker Correspondence, Mss.B.H76
John L. LeConte Papers, Mss.B.L493
Sir Charles Lyell Papers, Mss.B.L981
Samuel George Morton Papers, Mss.B.M843
Muhlenberg Family Papers, Mss.B.M891
Sir Roderick Impey Murchison Correspondence, Mss.B.M93
Sir James Paget Correspondence, Mss.B.P212
Scientists Collection, Mss.509.L56
Frank Siebert Papers, Mss.Ms.Coll.97
Jasper Yeates Papers, Mss.Ms.Coll.151

Temple University Libraries

Downingtown Industrial and Agricultural School (Accession #MS005DI), Charles L. Blockson Afro-American Collection