Ian, There are actually two Eli and Frances Banfield. The first is Eli Banfied and Frances Hosking, they had a son Eli and he also married a Frances (however as yet I can not find her maiden name). Sampson was the son of the second Eli and Frances, Frances Hosking (the first Frances) was his grandmother. I know this is very confusing, it took me two years of constant searching to figure it all out... I have more information on this family I'd be glad to share.
I sent you an email through your family page earlier.