siege engine

Opposite this hill Bohemund's men now bc-an to dig in a definite direction. For the besiegers had devised this new mischief against the city and invented a new knavish siege-engine to apply to the town. For as they dug, they went along under the ground like moles boring holes in the soil and in places protecting themselves by sheds with high roofs against the stones and arrows which were thrown from above[…]