"That buzzing sound."
"Yes, I heard, but I didn't know what it was. Oh, Tom, what shall I do?"
"Don't worry. We'll see if anything happened. They may have caught that fellow. If not I'll plan another scheme."
Tom's first act was to call up the telephone exchange to learn where the second call had come from. He got the information at once. The address was in the suburbs. The man had not gone to the drug store this time.
"Did the detective get out to that address?" asked Tom eagerly of the manager.
"Yes. As soon as we were certain that he was the party you wanted, your man got right after him, Mr. Swift."
"That's good, I hope he catches him!" cried the young inventor. "We'll have to wait and find out."
"He said he'd call up and let you know as soon as he reached the place," the telephone manager informed Tom.
There was nothing to do but wait, and meanwhile Tom did what he could to comfort Mrs. Damon. She was quite nervous and inclined to be hysterical, and the youth thought it wise to have a cousin, who had come to stay with her, summon the doctor.
"But, Tom, what shall I do about those papers?" Mrs. Damon asked him. "Shall I send them?"