"Then here is where he stood," said Captain Hardy. "It is immediately behind the wood. Your mark pointed straight enough, Henry, but your man was farther away than you thought. Probably he ran behind this grove to make doubly sure he would not be seen from the highway. The hidden station must be in this end of the grove. We'll search again."
Once more they plunged into the wood. Again they examined every tree. Up one trunk after another shinned Roy and Lew, who were born climbers. But hunt as they would, search as they might, they found nothing to indicate a secret wireless. At last, completely baffled, they gave up the search.
"It's here," insisted Captain Hardy. "Our experience at the Elk City reservoir makes me sure of that. They're too clever for us. But we'll get them yet. We'll follow that roadster so closely next time that we can't miss the secret. It's too bad, boys, but don't be discouraged. We have done much to come so close. Now we'll go back to the road-house. It's long past time for luncheon."
CHAPTER XII
ANOTHER OBSTACLE
Time wore on. Now that there was something definite to work on, the secret service began to take a more active part in the spy hunt.
"You have helped us greatly," said the Chief to Captain Hardy, one day. "My men were so rushed with work that they simply could not take the time to go hunting round for clues. But now that the wireless patrol has furnished those clues, we shall be able to follow them up. But we want you to continue at work just the same. You can still help us."
But the members of the wireless patrol, and especially Henry, found small satisfaction in the Chief's praise. They had not come to New York merely to furnish the secret service with clues. They had come to uncover the system by which spies were betraying the movements of our transports. At the Elk City reservoir they had succeeded where trained men had failed; and they meant to succeed here also. They felt that the Chief was patting them on the head, as it were, and telling them that they were good little boys. They meant to show him they were the equals of his own men, even if the Chief's words, instead of pleasing them, stimulated them to half angry activity.
"He needn't think that just because we're boys and come from the country we aren't any good," argued Roy. "That's the way everybody talks about boys. That's the way they talked about us at Elk City until we caught the dynamiters and showed them what we could do. We'll show Uncle Sam's men, too. I don't care if they are famous detectives. We'll get these fellows ourselves. We're not going to have the secret service step in now and take all the credit."