These are copies in an unknown hand [the name "Meriel Nevill Watt" appears in the front of the volume] of letters, primarily from Ellis, that were published in the "Philosophical Transactions" of the Royal Society in London. Most relate to botanical topics, and many are written to Peter Collinson. A few are written by Peter Woulfe. Included are contemporary engravings from the "Transactions," as well as original wash drawings copied from the engravings.

Letters collected by Whitfield J. Bell, Jr., including correspondence and papers submitted to the Society. Pertains to APS members and associations. Includes letters by Franklin, Winthrop, Endecott, Eliot, etc. Scientific and historical references, primarily. Some of the subjects discussed are astronomy, botany, electricity, natural history, and Indian missions. Also included is Roger Curtis' "Journal of the Moravian Mission to Labrador."

This microfilm contains letters and drafts of replies, memoranda, lists of plants and shrubs, observations on natural history, diary notes, extracts from reading, and recipes. There is a "Catalogue of Books given to [Friends] Publick School of Philadelphia" by Collinson dated 1749. There is a copy by Collinson of a May 16, 1560 note by Elizabeth I of a gift of old clothes to her maids of honor. A 1811 letter is from C. S. Collinson to Aylmer Bourke Lambert.