1To Benjamin Franklin from Peter and Michael Collinson, 14 July 1767 (Franklin Papers)
AL : Historical Society of Pennsylvania P Collinson and Son’s Respects to their Good Friend Benn:...
2To Benjamin Franklin from Michael Collinson, 9 March 1771 (Franklin Papers)
ALS : Historical Society of Pennsylvania I return the Soliloquy which is indeed in too many...
3To Benjamin Franklin from Michael Collinson, [March? 1772] (Franklin Papers)
AL : American Philosophical Society Mr. Collinson’s very respectful Comp[limen]ts to Dr. Franklin...