I forgot to take a picture after class, so I quickly tried to recreate it digitally, particularly to show the poorly erased, not-quite-proportionate mess that it was.
I have, however, made a major mistake in the drawing that can only really be fixed by redoing it completely. I forgot to do concept and gesture sketches, which created an unfortunate and easily prevented mistake with both sizing and object placement. For example, in the reference picture, the walls to each side of the exit are three squares wide. I drew it by only two, which cut out the grandfather clock completely.
Hopefully, by inking and shading it, I can still make the picture look nice.