This case is remanded to the workmen's compensation appeal board for finding of the facts by that board. See Kelley v. National Coal Coke Co. (1968), 381 Mich. 131. While the facts in this case seem reasonably clear, it is not the province of this Court or of the Court of Appeals to make findings of fact.White v. Michigan Consolidated Gas Co. (1958), 352 Mich. 201, 209. If upon remand, the appeal board finds that plaintiff's original compensable disablement, due to the fractured hip, came to an end and that thereafter plaintiff suffered a new compensable disablement due to the aseptic necrosis, the one-year-back rule should not be applied. If the appeal board finds there was a single compensable disablement, the aseptic necrosis manifesting itself in the progression of such single disablement, the one-year-back rule should be applied. Finally, upon the present record or upon the taking of such further proofs as the parties may wish to submit, if the appeal board is unable to make either finding, it should affirm the award of the referee due to the failure of plaintiff to bear his burden of proving a further development. See CL 1948, § 413.12 (