"What is that?" asked Frank.
"Why, I'd like to know whom Rollins radioed to last night."
"I found that out, too," said Mr. Temple. "He was talking to the Calomares ranch in Old Mexico, which has a very powerful station, according to Rollins. He says the German, Von Arnheim, told him that there are similar powerful radio stations scattered throughout Mexico and South America, all built by German money for the use of its spy system. And he said this German told him the most powerful station of all was on an island in the Caribbean, and that it was so powerful it could communicate with Nauen, Germany."
It was apparent that Mr. Temple had concluded his explanation, and Bob and Frank began to ply him with questions. Jack, however, stood silent, his face averted. Mr. Temple presently broke from the others and laying a hand on Jack's shoulder whirled him about.
"Father?" asked he, in a kindly tone.
"Yes, sir."
"Well, Jack, I've got the beginnings of a plan in mind. But first I must get more information from Rollins. Then I'll talk to you again."
Jack looked him squarely in the face.
"Mr. Temple," said he firmly, "I'm desperate. Father is everything in the world to me. I'll wait to talk with you. But I tell you frankly the only plan that appeals to me is to ride into Old Mexico and rescue him."
The eyes of Bob and Frank, who had turned to listen, lighted up, and they nodded vigorous approval. Mr. Temple stood off and looked at the trio of husky fellows as if seeing them for the first time.