There was no doubt in his mind that it was the purpose of the plotters to blow up the great dam on the next day, probably after nightfall. As has been said, he could thwart the plans of the traitors by communicating with the secret service men under Lieutenant Gordon, but that course would not be apt to bring about all the desired results. He wanted to arrest every man connected with the plot. Not only that; he wanted proof to convict every one of them.