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.
1777 - 1821
Rota was an italian miniaturist staying in Sweden 1806 to 1817.
Hammarlund
Bland arbeten.
Encyclopédie ou dictionnaire universel raisonné des connaissances humaines.
Karta öfver Stockholm. - 1904.
Svensklusern, Medicago falcata - Lindman, C. A. M, Bilder ur Nordens Flora 1917-26.