Their own First House skeleton, ridiculously girdled in that pure white, had come over to make them both a very respectful bow. A thrill of suspicion was growing in Harrowhark regarding the fluidity of its reactions. Its movement was too free, and when she angled her body in its direction it mirrored her in unconscious response, which was beyond her and therefore beyond any skeleton-raiser of the Nine Houses.

Harrow the Ninth - Act One, Chapter Eight