Joyce, This is a long shot but I viewed your posting history and wondered if you might be related to my Joseph Hatfield.
His mother was Adeline Hatfield b. 1856 Grayson Co., KY She is listed in the 1880 Rock Creek Grayson KY census as a housekeeper in the home of Abraham Davis Skaggs.She has a son named J.P. Hatfield b. 1879, Grayson, KY.(No father listed.) She is also listed again ( I believe ) in her family home in Big Clifty, Grayson KY- same age, single, housekeeper, etc. (no son listed though)
Adeline later married Abraham Skaggs around 1880 and had many other children with him as the father.He was 46 years older than she was!He was born in 1810-12.Anyway, his family is all listed with a last name of Skaggs, except for Joseph B. Hatfield, that continued to live with them for awhile.
You mention that your Joseph Cain was perhaps adopted and lived in Grayson Ky for awhile.His mother was an Adeline Hatfield. I think the birth dates are close as well. Do you think that we have a match? Hope this reaches you- Karen