Judgment unanimously affirmed. Memorandum: In this habeas corpus proceeding the record is convincing that the proceedings, culminating in the revocation of relator's parole, comported with all due process requisite under Morrissey v Brewer ( 408 U.S. 471), both in fact and opportunity accorded to relator. Relator's knowledgeable waiver of counsel at the ultimate revocation hearing forecloses any complaint as to his failure to exercise his hearing rights. Nor is there merit to relator's contentions, raised as to the quality and adequacy of the evidence presented, to sustain the administrative finding of the Board of Parole of violation by relator and its determination of revocation.