"SEC. 5. _And be it further enacted_, That it shall be the duty of all marshals and deputy-marshals to obey and execute all warrants and precepts issued under the provisions of this act, when to them directed; and should any marshal or deputy-marshal refuse to receive such warrant or other process when tendered, or to use all proper means diligently to execute the same, he shall, on conviction thereof, be fined in the sum of $1,000, to the use of the person upon whom the accused is alleged to have committed the offense. And the better to enable the said commissioners to execute their duties faithfully and efficiently, in conformity with the Constitution of the United States and the requirements of this act, they are hereby authorized and empowered, within their counties respectively, to appoint, in writing, under their hands, any one or more suitable persons, from time to time, to execute all such warrants and other process as may be issued by them in the lawful performance of their respective duties; and the persons so appointed to execute any warrant or process as aforesaid, shall have authority to summon and call to their aid the bystanders or the _posse comitatus_ of the proper county, or such portion of the land and naval forces of the United States, or the militia, as may be necessary to the performance of the duty with which they are charged, and to insure a faithful observance of the clause of the Constitution which prohibits slavery, in conformity with the provisions of this act; and said warrants shall run and be executed by said officers anywhere in the State or Territory within which they are issued.