Jim: I was going to suggest the same thing as Dr. Massey. I don't have their E-mail or web address, but you should get them by Googling "State Library of Virginia". It is one of the more user-friendly archives that I've visited. One other possible source, also there, could be her Confederate pension application (if she survived him and drew a pension), which includes the date of marriage (but not the place). The Virginia Confederate pensions are on-line.