Posted on: Johnston Queries Board URL: http://cgi.rootsweb.com/~genbbs/genbbs.cgi/surnames/joh/Johnston?read=234 Surname: Cassatt, Johnston, Stevenson, Simpson ------------------------- Looking for information on Alexander Johnston, maternal grandfather of Mary Stevenson Cassatt, Impressionist painter. His daughter was Katherine Kelso Johnston married ________Cassatt. Alexander married Mary Stevenson. _______ Simpson was paternal grandmother of Mary Cassatt.