After the capture of Uncle Dock and his associates, Fenton Hardy and the Secret Service men had wasted no time. Frank had remembered the New York address of the mysterious Burgess, that he had heard Uncle Dock mention, and a telegram to the New York police resulted in the arrest of this man, who turned out to be the brains of the gang, the man who had arranged for the distribution of the spurious bills. The crooks in Barmet village, and the rascally woman in black were also apprehended. "The machinery in the mill," Mr. Hardy told his sons, "was the most complete and efficient they could obtain. Markel, it seems, was at one time an expert photo-engraver. He furnished the engravings that enabled them to make such an excellent imitation of United States currency, while Uncle Dock and the other man helped him turn out the bills. Burgess saw to it that they got the proper paper and also planned the distribution. There were enough bad bills lying on the table when we raided the place to have netted them almost half a million dollars between them." Thanks to the quick work of the officers, not one member of the gang had escaped. In Burgess' rooms had been found a notebook containing the names and addresses of the agents he had working for him, distributing the counterfeit money throughout the country, and by the next day every man had been apprehended. The two Secret Service men who had aided in the final round-up of the counterfeiters at the old mill called personally at the Hardy home next day to congratulate the boys. "We've been working around here for almost a week trying to get the goods on these men," said one, "but never once did we think of the old mill. What made you suspicious of that place?" Frank told him how they had first learned that strangers had taken over the mill and told of their first visit to the place. "To tell the truth," he said, "my first suspicions were when Uncle Dock offered to give us a reward for helping save Lester from the river. He took two five dollar bills from his pocket and offered them to us. Then the other man snatched them from him, turned around, and later offered them to us again." The Secret Service man smiled. "Uncle Dock offered you two counterfeit bills and the other man was afraid they would be detected and that you would know where they came from." "I suppose that was his idea. But it made me suspicious. After that, Joe and I kept watching the place and as everything seemed to indicate that something suspicious was going on at the mill we made up our mind to pay them a visit." "And a very lucky thing it was that you did. It was a smart piece of work and I want to assure you that the Government won't forget it." The Government did not forget it. Before the month was out, the Hardy boys had received a check for one thousand dollars as a reward for the part they had played in the capture of the counterfeiters.