"
"What shall we do?" queried Bennett, evidently very much alarmed
at the threat.
"Do?" replied Kennedy, laughing contemptuously at the apparently
futile threat, "why, nothing. Just wait."
. . . . . . . .
The day proved uneventful and I paid no further attention to the
warning letter. It seemed too preposterous to amount to anything.
Kennedy, however, with his characteristic foresight, as I learned
afterwards, had not been entirely unprepared, though he had
affected to treat the thing with contempt.
His laboratory, I may say, was at the very edge of the University
buildings, with the campus back of it, but opening on the other
side on a street that was ordinarily not overcrowded.
We got up as usual the next day and, quite early, went over to the
laboratory. Kennedy, as was his custom, plunged straightway into
his work and appeared absorbed by it, while I wrote.
"There IS something queer going on, Walter," he remarked. "This
thing registers some kind of wireless rays--infra-red, I think,--
something like those that they say that Italian scientist, Ulivi,
claims he has discovered and called the 'F-rays.'"
"How do you know?" I asked, looking up from my work. "What's that
instrument you are using?"
"A bolometer, invented by the late Professor Langley," he replied,
his attention riveted on it.
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