See Tennon v. Ricketts, 574 F.2d 1243 (5th Cir.1978), cert. denied, 439 U.S. 1091, 99 S.Ct. 874, 59 L.Ed.2d 57 (1979).3 There are times when a state's supreme court has not yet decided a point of law so that the decisions of lower courts, statutes and other sources must suffice.