Dragging him from his bed at midnight in the depth of winter, he had compelled the old man, with no covering but his night gear, to walk with naked feet twenty-five miles over ice and snow from Grave to Buren, while he himself performed the same journey in his company on horseback.

He had then thrown him into a dungeon beneath the tower of Buren castle, and kept him a close prisoner for six months.
[Memoires de Philippe de Comines (Loud.

et Paris, 1747), liv.

iv.
194-196.

In the Royal Gallery at Berlin is a startling picture by Rembrandt, in which the old Duke is represented looking out of the bars of his dungeon at his son, who is threatening him with uplifted hand and savage face.