"But what good would it do even if we did get his signal?"

"We should at least know he had something to say to us."

"I should consider that a negative satisfaction," Walter replied. "It would just be an aggravation. However, here she goes! As you say, it can harm nobody to get the right meter."

"There's that old commercial station up the Cape," announced Dick, presently. "That fellow is always on the job at this hour."

"Probably he has to be, poor soul," Walter returned. "We'll get rid of him in a minute. What was that?"

"It is some one on our line. That's the Siren's call. It's O'Connel! Jove! What are you doing, man? What are you going to do?" asked Dick excitedly as he saw Walter's hand go out.

"Paper! Pencil! Hurry, can't you?" gasped Walter.

"Do you mean——"

"Let's both take it down in dots and dashes. Between us we may be able to make some sense out of it afterward. Quick!"

Clearly and evenly the message ticked itself off. Then there was silence.