It shall be lawful for any officer or servant of the promoters or lessees of any tramway, and all persons called by him to his assistance, to seize and detain any person discovered either in or after committing or attempting to commit any such offence as in the next preceding section is mentioned, and whose name or residence is unknown to such officer or servant, until such person can be conveniently taken before a justice, or until he be otherwise discharged by due course of law.