Source:Thurston-1856

George H. Thurston. Directory for 1856–'57, of Pittsburgh and Allegheny Cities, Birmingham, East Birmingham, South & West Pittsburgh, Temperanceville, Manchester, Duquesne and Lawrenceville Boroughs, East Liberty, and Parts of Pitt and Collins Townships. George H. Thurston, Pittsburgh, 1856. Google Books HwYuAAAAYAAJ; HathiTrust 011562263; Historic Pittsburgh 31735038289074.

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• Map of Fort Pitt in 1795, preceding p. iii (Historic Pittsburgh 31735038289074)
• Street directory, Allegheny, p. xxii (Google Books HwYuAAAAYAAJ; HathiTrust hvd.hn46ja; Historic Pittsburgh 31735038289074)
• Street directory, Pittsburgh, pp. xxv–xxvi (Google Books HwYuAAAAYAAJ; HathiTrust hvd.hn46ja; Historic Pittsburgh 31735038289074)