Trained at Louvain, he had, from his earliest youth, an ardent desire to dissect, and cut up mice and rats, and even cats and dogs.

To Paris, the strong school of the period, he went in 1533, and studied under two men of great renown, Jacob Sylvius and Guinterius.

Both were strong Galenists and regarded the Master as an infallible authority.

He had as a fellow prosector, under the latter, the unfortunate Servetus.

The story of his troubles and trials in getting bones and subjects you may read in Roth's "Life."(20) Many interesting biographical details are also to be found in his own writings.