"Hello," we heard him answer. "Yes, this is it. Who is this?"

He had disguised his voice. We waited anxiously and watched his
face to gather what response he received.

"The deuce!" he exclaimed, with his hand over the transmitter so
that his voice would not be heard at the other end.

"What's the matter?" I asked eagerly.

"Whoever he was," replied Garrick, "he was too keen for me. He
caught on. There must have been some password or form that they
used which we don't know, for he hung up the receiver almost as
soon as he heard me."

Garrick waited a minute or two. Then he whistled into, the
transmitter. It was done apparently to see whether there was
anyone listening. But there was no answer. The man was gone.

"Operator, operator!" Guy was calling, insistently moving the hook
up and down rapidly. "Yes--I want Central. Central, can you tell
me what number that was which just called up?"

We all waited anxiously to learn whether the girl could find out
or not.

"Bleecker seven--one--eight--o? Thank you very much. Give me
information, please."