It looks like a new breakthrough on the Spencer line….thanks to this email from newly found 4th cousin Linda Portwood.
I stumbled across your very interesting Howell Family Genealogy Pages, and was surprised to find your Ancestor, William Spencer. I think that we are distantly related, through my Great Great Great Grandfather Thomas Spencer, who I think was the elder brother of your ancestor William Spencer. I noted that you had no Ancestors for William Spencer. I have traced my Spencer Ancestry back to 1687, and would be willing to share this information with you. In my information, William Spencer is mentioned as emigrating to Canada, and later America. He is also a marriage witness at his brother Thomas Spencer’s marriage in 1826. My Spencer ancestors lived in the area that you give as William’s birthplace.
William Spencer: John and Susan Howell’s Family History Pages.