Whenever they choose to do so, they may seize him and deliver him up in their discharge; and if that cannot be done at once, they may imprison him until it can be done. They may exercise their rights in person or by agent. They may pursue him into another state; may arrest him on the Sabbath, and, if necessary, may break and enter his house for that purpose. The seizure is not made by virtue of new process. None is needed.