“ Goldstein, supra, the remedy by a proceeding coram nobis in the court where the judgment of conviction was entered (here the Court of General Sessions, New York County) is exclusive; and that habeas corpus accordingly is not available to petitioner in the state courts, even if on the merits petitioner has set forth a prima facie case. Petitioner takes the contrary position. ”

“ In his brief and argument in this Court, the Attorney General of the State of New York, on respondent's behalf, took the position that New York law makes the writ of habeas corpus available to test the constitution validity, under the Due Process Clause, of petitioner's detention. In support of this contention the Attorney General relied upon a number of cases in the New York courts, which appear to sustain his position. People ex rel. ”

“ Martin, 289 N.Y. 471, 46 N.E.2d 890, or where a relator is held in custody under the provisions of a statute claimed to be unconstitutional. See People ex rel. Bryant v. Zimmerman, 241 N.Y. 405, 150 N.E. 497, 43 A.L.R. 909 ”