empty store where the police must be hiding. Then we went in and casually sauntered back of the partition. Luigi was there already. There were several customers still in the store, however, and therefore we had to sit in silence while Vincenzo quickly finished a prescription and waited on the last one.

At last the doors were locked and the lights lowered, all except those in the windows which were to serve as signals.

"Ten minutes to twelve," said Kennedy, placing the oblong box on the table. "Gennaro will be going in soon. Let us try this machine now and see if it works. If the wires have been cut since we put them up this morning Gennaro will have to take his chances alone."

Kennedy reached over and with a light movement of his forefinger touched a switch.

Instantly a babel of voices filled the store, all talking at once, rapidly and loudly. Here and there we could distinguish a snatch of conversation,[59] a word, a phrase, now and then even a whole sentence above the rest. There was the clink of glasses. I could hear the rattle of dice on a bare table, and an oath. A cork popped. Somebody scratched a match.

[59]

We sat bewildered, looking at Kennedy.

"Imagine that you are sitting at a table in Albano's back room," was all he said. "This is what you would be hearing. This is my 'electric ear'—in other words the dictagraph, used, I am told, by the Secret Service of the United States. Wait, in a moment you will hear Gennaro come in. Luigi and Vincenzo, translate what you hear. My knowledge of Italian is pretty rusty."

"Can they hear us?" whispered Luigi in an awestruck whisper.

Craig laughed. "No, not yet. But I have only to touch this other switch, and I could produce an effect in that room that would rival the famous writing on Belshazzar's wall—only it would be a voice from the wall instead of writing."

"They seem to be waiting for someone," said Vincenzo. "I heard somebody say: 'He will be here in a few minutes. Now get out.'"

The babel of voices seemed to calm down as men withdrew from the room. Only one or two were left.

"One of them says the child is all right. She has been left in the back yard," translated Luigi.

"What yard? Did he say?" asked 

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