found: Mason, C. A plan of the west line or parallel of latitude ... 1768:map recto (name not given)
found: LC data base, 7-28-84(hdg.: Dixon, Jeremiah)
found: Tooley's dict. of mapmakers, 1979(Dixon, Jeremiah, boundary Md & Pa. 1768, with Mason)
found: Mason & Dixon, 1997:t.p. (Dixon) jkt. (Jeremiah Dixon (1733-1779))
found: Wikipedia, Feb. 3, 2015(Jeremiah Dixon; b. 27 July 1733, Cockfield, County Durham, England, d. 22 January 1779, Cockfield, County Durham, England; English surveyor and astronomer who is best known for his work with Charles Mason, from 1763 to 1767, in determining what was later called the Mason-Dixon line) - http://en.wikipedia.org/wiki/Jeremiah_Dixon