“Oh! You don’t understand,” Jessie interrupted. “No ordinary radio set broadcasts. It merely receives.”

As clearly as she could she explained what sort of plant there must be from which the strange girl had sent out her cry for help.

“Of course, you understand, the girl must have got a chance on the sly to speak into the broadcasting horn. Now, all the big broadcasting stations are registered with the Government. And if secret ones are established the Government agents soon find them out.

“It might be, if the people who imprisoned this girl are the ones we think, they may have a plant for the sending out of information that is illegal. For instance, it might have some connection with race track gambling. One of the women is interested in racing and the other in automobile contests. If the broadcasting plant is near a race course or an autodrome——”

“Now you give me an idea, Miss Jessie!” exclaimed Chapman suddenly. “I remember a stock farm over behind Parkville where the barns are painted red. And there is a silo or two. Besides, it is near the Harrimay Race Course. I could drive over there in the morning, if you want to go. Mr. Norwood won’t mind, I am sure.”

“Would you go, Amy?” Jessie asked, hesitatingly.

“Sure! It’s a chance. And I am awfully anxious now to find out what that mysterious voice means.”

CHAPTER XIX
A PUZZLING CIRCUMSTANCE

Jessie’s parents being away, Amy ran home and announced her desire to keep her chum company and was back again before ten o’clock. There was not much to be heard over the airways after that hour. They had missed Madame Elva and the orchestra music broadcasted from Stratfordtown.

“Nothing to do but to go to bed,” Amy declared. “The sooner we are asleep the sooner we can get up and go looking for the mysterious broadcasting station. Do you believe that cry for help was from little Hen’s cousin?”