I am not sure i can be of help but my niece is tracing our history and i know that there is a Harrisonin our family. He would go back to my husbandsfathers (hershal adkins) side of the family. Hershal is the son of Della Adkins who had a brother Harrison. There parents wereWhitten and Caroline Adkins. i do not know if this is the Harrison Adkins you are looking for.
I am not sure this will be ofhelp to you or not but would be interested if it is what or part of what you needed.