#1 Duncan, John M. (John Morison) 1795?-1825 - Travels through part of the United States and Canada in 1818 and 1819
#2 John M. Duncan, 1902-1976 - 12 days 'til Trenton
#3 Duncan, John M. Down the Mast Road.
#4 John M. Duncan - Foundations
#5 Duncan, John M. (John Mason), 1790-1851 - A reply to Dr. Miller's Letter to a gentleman of Baltimore,: In reference…
#6 John Duncan - Three Billy Goats Gruff