engines. The Roman balista, or catapults that would cast stones up to 300 lb.. quarter of. mile.
Cunning. Old Eng.. knowing, or skilful.
marvellously helped: or, marvelled at for being helped.
till he was strong. This is the zone of real danger. When we are weak, then are we strong (2 Corinthians 12:9; 2 Corinthians 12:10; 2 Corinthians 13:4).