If any of His Majesties . . . F2 Subjects . . . F2 shall committ any Piracy or Robbery or any Act of Hostility against other His Majesties Subjects upon the Sea under Colour of any Commission from any Forreigne Prince or State or Pretence of Authority from any Person whatsoever such Offender and Offenders and every of them shall be deemed adjudged and taken to be Pirates Felons and Robbers . . . F3