Punishment for escape or attempt to escape from hospital or asylum.

(1) If any prisoner dealt with under section 39-A escape or attempts to escape from the hospital or asylum to which he has been sent or when going thereto or returning therefrom, he shall be punished with imprisonment for a term which may extend to five years, or with fine, or with both. (2) Such punishment shall be in addition to the punishment for which the prisoner was liable for the offence of which he was already convicted.