The Supreme Court may appoint a marshal to serve at its pleasure, and to perform such duties as it may assign. The marshal shall have the criminal and civil powers of a sheriff, and any additional powers necessary to execute the orders of the appellate division in any county of the State. His salary shall be fixed by the Administrative Officer, subject to the approval of the Supreme Court. The marshal may appoint such assistants, and at such salaries, as may? be authorized by the Administrative Officer of the Courts. The Supreme Court, in its discretion, may appoint the Supreme Court librarian, or some other suitable employee of the court, to serve in the additional capacity of marshal. (1967, c. 108, s. 1.)