Cheval glass

It was a large room, […] furnished, among other things, with a cheval-glass and a business table, and looking out upon the court by three dusty windows barred with iron.

Next, in the course of their review of the chamber, the searchers came to the cheval-glass, into whose depths they looked with an involuntary horror. […]

Next to the cheval-glass, Kit noticed a pale dressing-gown, of all-but-insubstantial chiffon, not draped over a chair but standing erect, […].