"We'll have a posse out there in half an hour," he said to his sons. "Three state troopers and two Secret Service men who have been working on this case are in town. Will that be enough?" "There are three in the counterfeiting gang," Frank told him. "We'll have enough. And now tell me how you found out about the old mill." Briefly, Frank and Joe told him how their suspicions had first been aroused by the mysterious activities about the mill, how they had visited the place and found that strangers were not welcome, how they had finally resolved to investigate for themselves, and how they had that night gone to the mill and seen the counterfeiting plant in actual operation. Their story was interrupted by the arrival of an automobile which drew up in front of the Hardy home with a squeal of brakes. A man in uniform stepped out and ran up the walk. "Here are the officers," said Mr. Hardy. "Come along." They left the house and met the officer on the steps. Mr. Hardy spoke to him. "They are at the old Turner mill on Willow River," he said quietly. "I suppose you know how to get there." "Can't say that I do," said the officer. "Not by car." "Follow the shore road and then cut in on that deserted loop. It used to run right past the mill before the shore road was built." The trooper nodded. "I remember now. The deserted road, eh? We'll get there all right." "Better leave the car back on the road some distance and go the rest of the way on foot," suggested Frank. "We can sneak up on 'em better that way." They clambered into the automobile. The other men were broad-shouldered, keen-eyed fellows with determined faces. The moonlight glinted on rifle barrels and revolvers. Through the cool night sped the automobile, out the shore road, leaving Bayport behind, until at last the car turned off into the deserted road, rocking and bumping to and fro in the ruts. When they reached the place where Frank and Joe had abandoned the motorcycles earlier in the evening the boys spoke to the driver, whereupon he brought the car to a stop. They got out and stood in a little group in the moonlit road. Fenton Hardy was in charge of the raid, and he gave his orders quickly and with precision. The men were to follow the road until they reached the meadow between the wood and the mill. The troopers were to deploy out so as to come up in the rear of the mill; the Secret Service men and the others were to take the front way. They trudged down the road until at last they stood at the edge of the wood and they could see the mill below them in the moonlight. Then the three troopers moved off to the right, keeping well in the shade, preparatory to cutting down across the meadow toward the back of the mill. Fenton Hardy, the two Secret Service men and the boys walked boldly across the meadow. They were not seen. There was not a sound from the mill.