My great grandfather was Wrenford H. Coram (1852-1943). He had a brother, Alfred E. Coram (1857 - 1933), whose 13 children had the same names as your grandfather, Roscoe's. However, Alfred was the brother of Wrenford and Roscoe was the son of Wrenford. Something does not fit. My great grandfather Wrenford was born in Devon, England in December of 1852, immigrated to Canada in 1856, then immigrated to Linn County, Missouri in 1868, and died there in 1943. Is this the same Wrenford as your great grandfather?