1770-1823.
Vallance arrived in Philadelphia from Glasgow Scotland early in 1791. He quickly established his reputation as one of the best engravers in the city. During this period he developed a friendship with James Thackara. In 1791 Vallance married Elizabeth Trenchard, a niece of Thackara's wife Hannah. A partnership with Thackara was established. He engraved banknotes and documents. In addition he was one of the founders, in 1774, of the Association of Artists in America. His wife Elizabeth died in 1798 at the age of 28. Four years later he married again to Margaret Pratt.
Washington Map Society.
Bland arbeten.
Encyclopédie ou dictionnaire universel raisonné des connaissances humaines.
Ca. 1800.
Engelsk kartograf. Förutom kartor över Skandinavien utgav han en vägkarta över Storbrittanien. (2. utg. 1803.)
Stockholm - Mentzer ca 1860.
Finska viken, östra delen. Karelska kusten med Viborg, Estniska och Ingermanländska kusten med Narva samt St Petersburg. - A. Nagaev 1757.
