"Well, he was surprised. And what's more, we got hold of that dollar at exactly the right moment. The secret service men arrested a Mexican who was wading the Rio Grande at El Paso last night. They searched him and found nothing on him that seemed incriminating. They questioned him and the fellow finally said he had smuggled some tobacco into this country, so they put him in jail as a smuggler. The fellow had some money he had gotten for his tobacco—and it was three silver dollars! The secret service men down there knew nothing of what we have found out here, so they gave the fellow back his money. But I am morally certain that their man is the spy who carries the messages across the border."
"Of course," cried Willie. "What else could he be—sneaking across the boundary with three silver dollars."
Everybody laughed.
"It doesn't follow that he's a spy, just because he has three silver dollars. He may be a smuggler, all right enough. But I believe the smuggling is just a blind. If he were a genuine smuggler, he'd bring more than three dollars' worth of stuff across."
"What have they done with his dollars now?" asked Roy eagerly.
"I don't know, Roy. The Chief got into instant touch with his men at El Paso as soon as I showed him the dollar Henry got. But I left before I knew what the outcome was. However, I have no doubt they will find that the dollars are what we suspect them to be."
"Gee!" said Willie. "To think that the wireless patrol found out about those dollars!"
"I guess the secret service knows by this time that boys are worth something," smiled Roy. "Before we get through, they may think so even more."
"You're certainly not increasing in modesty," laughed their leader.
"Well, I don't care," said Roy hotly. "It makes me tired. Everybody says, 'Oh! They're only boys.' Of course we're only boys, but look at what we've done. Why, the wireless patrol has got the best set of fellows——"