According to the Montgomery Co., MD census records, Alexander was widowed by the time he married Mary Elizabeth Beckwith, 30 October 1845 in Montgomery Co. Accordingly, Elizabeth was 20 years of age when married to Alexander. At the time of the 1850 census, identifies three children, John C. Age 3; Mary E., Age 2, and unmaned female 3/12.Another Elizabeth, Age 65 resides in household.Alexander said to born 1815; died 1899. Should this be the same Elizabeth, advised she was an only child. The Benwith Farm is located in Glen Mills [near Rockville], Maryland. Nan Boswell [firstname.lastname@example.org] sends; however, credit is due to: Howard Boswell.