Hi, Keith! I answered your email about a week ago and have finally had some time to look for your Wm. Henderson and Mary Ann Alexander. Mary Ann was my ggrandfather's sister. My infor shows that Mary Ann and Wm. were married in St. Joseph, MO on July 28, 1861. I have several pages of information on them and other Hendersons. I also have a picture of Mary Ann (nickname Polly) and Wm. I would be happy to answer any questions you have or, if you give me your snail mail address, I would be happy to copy the pages and mail them to you. Good luck! Darla