Margaret Pratt (1770-1xxx), see http://www.mytrees.com/newanc/Scotland/Born-1770/Va/Vallance-family/John-Vallance-cr001476-7384.html
1st: Rebecca ; 2nd: Catharine, married Pratt ;
1770 in Scotland
1823
Philadelphia
grandson Chris, born 1820
United States of America
Benjamin Smith Barton (1766-1815) ; William Paul Crillon Barton (1786-1856) ; Map of the United States of America with contiguous British & Spanish possessions (1816) ; Description topographique et politique de la partie espagnole de l'isle Saint-Domingue (1796) ; J. Hunter Treatise of Venereal Disease (1791) ; Transactions of the American Philosophical Society (Philadelphia 1771-1809) ;