aint in actual use is the thumb cuff, and from illustration you can see just exactly what it is, and how it is used. Mr. P. C. Holland, the great criminalogist of Chicago and editor of "The Detective," informs me that this thumb cuff was invented sixteen years ago, and that the inventor died on his… … Thumb Cuff In freeing yourself from the old-time thumb-screws it is not a difficult matter to open the smaller locks used with a common lock-pick. Thumb-screw used in the Bastille, Paris www.houdinisecretsrevealed.com 28
