"J. Clarke" wrote in message
Thanks for that--someone asked me a while back if I could make them a
hidden room and I've been trying to figure out a lock for it ever since
that didn't involve using a remote control.

You might consider a hidden magnetic touch latch. Although, one might argue
that it could also be considered a type of remote control.
http://www.leevalley.com/en/hardware...=3,41399,41403