There's the famous Murray Cabinet, by John Channon, on display in Temple Newsam House, Leeds.
Here it is closed:
and here's a detail of some of its
17 secret compartments.
Rob - if you feel like copying this, I'd love to see the wip pics!
[Incidentally, I'd not heard of this until I read "The Grenadillo Box" by Janet Gleeson - a murder mystery set in Thomas Chippendale's workshop, in which such a cabinet plays a central part. It's a bit light on constructional instructions (no diagrams in the text!) but some people on here might appreciate the period details, and a clever plot.]