George Flower « On the 9th day of March, 1824, Mr. Pickering became my brother-in-law by marriage with my eldest sister, Miss Martha Flower » cited in Illinois State Historical Society (2013). pp. 492-3. Journal, 1917 (Vol. 9). London: Forgotten Books. (Original work published 1917) http://www.forgottenbooks.com/readbook_text/Journal_1917_v9_1000600439/539 retrieved 22 October 2015
