“ On appeal from the District Court's dismissal of the petition without a hearing, the Court of Appeals for the Fourth Circuit noted that state remedies had not been exhausted, expressed its confidence that 'if the contention is squarely raised, the state courts will be willing to afford the petitioner a reasonable opportunity to prove his case,' and observed that a claim of judicial senility raised a most 'sensitive issue of state administration of state criminal justice.' 435 F.2d 453, 460 (1970) . ”