I just had to get in on this conversation. I am a descendant from the Doctor via his youngest son, John Paul F. Duval.I don't have any info on Alexander that you don't already have, but I do have some data on J.P.F. Duval's line (letters, pictures, etc.).
How are you and your sister connected?
I am glad to see Formyduval on GenForum. Thanks Bill.
Jerry Duval (Paul Duval, W.A. Duval, William Duval, John P.F. Duval, Jean Prospier Formyduval)