Any magistrate may, on complaint on oath being made by the master of a vessel, or some person in his behalf, that a seaman or boy apprentice has deserted from his vessel, and that he is harbored, secreted or detained, issue a warrant under his hand and seal to cause search to be made in any place wherein said seaman or boy apprentice may be harbored or secreted, and shall cause such seaman or apprentice, when found, to be delivered to the master of the vessel to which he belongs.