It was Carton.
"I have had my men watching the Mayfair," he announced. "There
seems to be a general feeling of alarm there, now. They can't even
find Loraine Keith. Brodie, apparently, has not shown up in his
usual haunts since the episode of last night."
"I wonder if the long arm of this vice trust could have reached
out and gathered them in, too?" I asked.
"Quite likely," replied Carton, absorbed in watching Kennedy.
"What's this?"
A little bell had tinkled sharply, and a light had flashed up on
the attachments to the apparatus.
"Nothing. I was just testing it to see if it works. It does,
although the end which I installed down below was necessarily only
a makeshift. It is not this red light with the shrill bell that we
are interested in. It is the green light and the low-toned bell.
This is a thermopile."
"And what is a thermopile?"' queried Carton.
"For the sake of one who has forgotten his physics," smiled
Kennedy, "I may say this is only another illustration of how all
science ultimately finds practical application.
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