Seven Keys to Baldpate
Seven Keys to Baldpate is a mentalism routine developed by Theodore Annemann which he named after the title of an Earl Derr Biggers mystery novel.
The effect uses a lock and several keys, only one of which will open the lock. The keys are mixed and selected by spectators and the mentalist devines which person is holding the key that will open the lock.
It was originally created by Kolar.
There are many methods and routines that have been developed over the years, including marketted versions.
- Lock of Gibraltar by Ken Allen
- Keys of Judah by Steward Judah