Due process of law does not require the provision of a right of appeal from a trial to a superior court. In McKane v. Durston21 the court declared that "a review by an appellate court of the final judgment in a criminal case, however grave the offense of which the accused is convicted, was not at common law, and is not now a necessary element of due process of law." 22 In Pittsburgh, etc., R. Co. v. Backus,23 with reference to a right of appeal in a matter of tax assessment, the court say: "If a single hearing is not due process, doubling it will not make it so."

21 153 U. S. 684; 14 Sup. Ct. Rep. 913; 38 L. ed. 867.

22 This is quoted with approval in Reetz v. Michigan, 188 U. S. 505; 23 Sup. Ct Rep. 390; 47 L. ed. 563; also in Andrews v. Swartz, 156 U. S. 272; 15 Sup. Ct. Rep. 389; 39 L. ed. 422; Fallbrook v. Bradley, 164 U. S. 112; 17 Sup. Ct. Rep. 56; 41 L. ed. 369.

23 154 U. S. 421; 14 Sup. Ct. Rep. 1114; 38 L. ed. 1031.