Source:Clapham
From Pittsburgh Streets
W. Clapham. Report of W. Clapham of Upper and Lower Town of Pittsburg: April 14 1761. 1761. Reproduced in William G. Johnston, Life and Reminiscences from Birth to Manhood of Wm. G. Johnston, p. 21, Knickerbocker Press, New York, 1901 (Google Books N-QEAAAAYAAJ; Historic Pittsburgh 00adj9508m; Internet Archive lifereminiscence00john).
