81. Windsor Imprint. A TREATISE ON SELF KNOWLEDGE; SHOWING THE NATURE AND BENEFIT OF THAT IMPORTANT SCIENCE, AND THE WAY TO ATTAIN IT. HUMAN NATURE. By John Mason. (Windsor, Vt., Simeon Ide, 1828). 24mo, 144 pp. with which are connected, Questions Adapted to the Work; for the Use of Schools With Notes. Condition: beginning to split at top of rear spine, good. See photos. $20.00 plus $2.50 P & H.