Authors:

The Hermit was known to be pretty sniffy about disciples who returned in failure. There was a wall of the institute layered with their skins- an ingenious display that encouraged vigor in his students, as well as nicely keeping out the drafts.

Jonathan Stroud (2005). “Bartimaeus Trilogy, Book Three: Ptolemy's Gate”, Disney-Hyperion
The Hermit was known to be pretty sniffy about disciples who returned in failure. There was a wall of the institute layered with their skins- an ingenious display that encouraged vigor in his students, as well as nicely