Michael Barrett said this quote

“ When Abbess Ebba received tidings of the near approach of the pagan hordes, who had already wrecked vengeance upon ecclesiastics, monks, and consecrated virgins, she summoned her nuns to Chapter, and in a moving discourse exhorted them to preserve at any cost the treasure of their chastity. Then seizing a razor, and calling upon her daughters to follow her heroic example, she mutilated her face in order to inspire the barbarian invaders with horror at the sight. The nuns without exception courageously followed the example of their abbess. When the Danes broke into the cloister and saw the nuns with faces thus disfigured, they fled in panic. Their leaders, burning with rage, sent back some of their number to set fire to the monastery, and thus the heroic martyrs perished in the common ruin of their house. ”