to the end of which was tied a piece of purple twine about four feet long. Placing the tweezers over the vertical bolt-handle, he turned them at a very slight angle to the left and then ran the twine under the door so that about a foot of it projected over the sill. Stepping into the court, he closed the door.
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The tweezers still held the bolt-handle as in a vise, and the string extended straight to the floor and disappeared under the door into the court. The three of us stood watching the bolt with fascinated attention. Slowly the string became taut, as Vance gently pulled upon the loose end outside, and then the downward tug began slowly but surely to turn the bolt-handle. When the bolt had been thrown
