The Danes brought up machines and attacked the monastery on all sides, and effected a breach in the walls.

Their first assault, however, was repelled, and Fulba, the brother of Earl Hulba, was desperately wounded by a stone.
Hulba was so infuriated at this that when, at the second assault, the monastery was captured, he slew with his own hand everyone of the monks, while all the country people who had taken refuge within the walls were slaughtered by his companions, not one escaping.

The altars were levelled to the ground, the monuments broken in pieces.

The great library of parchments and charters was burnt.

The holy relics were trodden under foot, and the church itself, with all the monastic buildings, burnt to the ground.