Above the sterile metal door was the more familiar sight of a mounted skull, probably once painted red but now tarry brown. It had lost its jaw at some point and seemed all front teeth. Harrow fussily crammed minuscule chips of phalange in and around the entryway. It was an unusual experience to be crossing, rather than barred from, a Nonagesimus bone ward, but Gideon didn’t get the time to enjoy it: Harrow pushed through the door and led Gideon through to another room.

Gideon the Ninth - Act Two, Chapter Fourteen