Sorry this response is so late but I just saw your message. My data indicates they married much later- December 14, 1849 (if indeed the same, but the similarities are too great. I have data on these Alexanders, I am decended from Cyrenius (also apparently known as Cyrus Alexander, son of Benjamin W. Alexander) who was born April 23, 1820 and died December 23, 1902. Cyrenius was married twice, first to Margaret Ann Cochran, and then Martha Ann Kirk. I have no records of any children from the first marriage, but 5 children were born of the second (to Kirk)- James Graham Alexander (my great grandfather), Margaret Ann Alexander, Jane Eliza Alexander, Alice Virginia Alexander, and Sylvester Alexander. I have information on earlier generations and on later as well. If still interested, please contact me. Regards.