To it, I noticed, he had attached two plugs that were "fool-
proof"--that is, one small and the other large, so that they could
not be inserted into the wrong holes. A long flexible green silk
covered wire, or rather two wires together, led from the disc. By
carefully moving the tires so as to preserve the rough appearance
they had of being thrown down hastily into the discard, he was
able to conceal this wire, also, in such a way as to bring it
secretly to the barred window and through it.
Next he turned his attention to the telephone itself. Another
instrument which he had brought with him was inserted in place of
the ordinary transmitter. It looked like it and had evidently been
prepared with that in view. I assumed that it must act like the
ordinary transmitter also, although it must have other uses as
well. It was more of a job to trace out the course of the
telephone wires and run in a sort of tap line at a point where it
would not be likely to be noted. This was done by Garrick, still
working in silence, and the wires from it led behind various
things until they, too, reached another window and so went to the
outside.
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