Hi I would love to see that picture you have of Mark and Isaac. Isaac would be my great, great grandfather. His son Issac married Ellen Keating in Nebraska and they had Jean Warrell. Jean is my grandmother. I can send you the information I have. Also who is your husbands grandfather?
I found Isaac Heaton also and wondered if the daughter Ann could be the right person. I heard from my relatives that John Warrell called her Nancy but it was not her real name. I do not have any proof of that though.
The information you have on William Warrell does'nt fit in with anything I have.