The act by which a prisoner, by force and violence, escapes from a place where he is lawfully in custody. This is an offence at common law. 2. To constitute this offence, there must be, 1. A lawful commitment of the prisoner; vide Regular and Irregular process. 2. An actual breach with force and violence of the prison, by the prisoner himself or by others with his privity and procurement. 3. The prisoner must escape.