hundred feet.

These preparations completed, there was nothing left to do but to
wait for something to happen. Spencer had declined to get alarmed
about our fears for his own safety, and only with difficulty had
we been able to dissuade him from moving heaven and earth to find
Miss White, a proceeding which must certainly have disarranged
Kennedy's carefully laid plans. So interested was he that he
postponed one of the most important business conferences of the
year, growing out of the anti-trust suits, in order to be present
with Dr. Lith and ourselves in the little upper back room.

It was quite late when Kennedy completed his hasty arrangements,
yet as the night advanced we grew more and more impatient for
something to happen. Craig was apparently even more anxious than
he had been the night before, when we watched in the art-gallery
itself. Spencer was nervously smoking, lighting one cigar
furiously from another until the air was almost blue.

Scarcely a word was spoken as hour after hour Craig sat with the
receiver to his ear, connected with the coils down in the
storeroom. "You might call this an electric detective," he had
explained to Spencer. "For example, if you suspected that anything
out of the way was going on in a room anywhere this would report
much to you even if you were miles away. It is the discovery of a
student of Thorne Baker, the English electrical expert. He was
experimenting with high-frequency electric currents, investigating
the nature of the discharges used for electrifying certain things.
Quite by accident he found that when the room on which he was
experimenting was occupied by some person his measuring-