Langdon, John (Boston, MA)
Bookseller, stationer and bookbinder
Massachusetts ( 1770) 1.& 2.
Hannah French, "Early American Bookbinding by Hand" from: "Bookbinding in America" Lehmann-Haupt ed. 1967. pg.101.
John Langdon and Henry Knox both apprenticed with Warton & Bowers. J. Leander Bishop, History of American Manufacturers, 1868, pg. 192.