Richter discusses Penn's 1681 letter to "the Indian kings."; HSP digital object: http://digitalhistory.hsp.org/pafrm/doc/william-penn-kings-indians-pennsylvania-october-18-1681
Letter from Theophilus Housbrooke, on behalf of Lord Woodhouselee, to Sally Bache regarding Benjamin Franklin's correspondence with Lord Kames, whom Lord Woodhouselee is writing a biography of.; Lord Woodhouselee published "Memoirs of the life and writings of the Honourable Henry Home of Kames : one of the senators of the College of Justice, and one of the Lords Commissioners of Justiciary in Scotland : containing sketches of the progress of literature and general improvement in Scotland during the greater part of the eighteenth century" in the early 19th century.