Do you have a birthdate for your Roy Tharp?
He might be a nephew of my great-grandmother Emma Jane THARP Bodkin. She lived most of her life in the Mexico, Audrain Co., Missouri area.
I have an old photograph (probably taken around 1918-1922)of my grandmother Thelma Marion Bodkin, her sister Frances Myra Bodkin, my great grandmother Emma Jane THARP Bodkin, her sister-in-law Sadie THARP and her son Roy THARP. The children appear to be teenagers.
My family of Bodkins and Tharps were primarily from Callaway Co. and Audrain Co., Missouri.