Jacob Switzer could very well have fathered 10 children at that age, I have an uncle that fathered two sons in his 70's. It is only women that can't have children in their old age, men can father children at any age apparently.. lol When you start looking into family history it is a jumble at times. But fun to do if you don't mind the confusion. I should go to the library and find out if Ann Brandt's book is there,, what is the name of it again? Hope this clears up the confusion of Jacob fathering 10 children in his fifties, it can and does happen. Judy