Tom’s face became serious in a minute. “I don’t like it either, Dorothy,” he answered gravely, “but I’m going to do it. Do you remember the little German middy lying down at the bottom? As long as the man who is trying to stop all war is at large there are thousands of men in hourly peril. I honestly believe we are the only ones who can run the man down. I am convinced we shall be wholly justified in such action.” Dorothy stood for a moment in silent thought. “I think you are right, Tom,” she said quietly. “In this case I hope and believe the end will justify the means. We must find ‘the man.’ Go ahead.” Stumbling through the darkness, we reached the top, where the flame of a match showed a strong oak door with two Yale locks upon it. Tom had the keys in immediately and threw the door open. Once within, Swenton passed with accustomed step to the wall, turned a switch, and incandescents lighted the whole place. We were in a sort of anteroom, with desks and chairs. “The outer office,” said Swenton briefly. We passed through an inner door. “The main laboratory,” remarked Swenton. This was similar to any other laboratory. A good sized motor generator in one corner, covered by a rubber sheet, a couple of tile-topped tables, a set of shelves on one side, filled with labelled reagent bottles, a set of glass cases, supported on a base filled with drawers, on the other. In the cabinets were glass ware and apparatus of various sorts. Tom started for the case, but Dorothy laid a restraining hand on his arm. “Wait till we have seen it all. Then we’ll go over the whole, piece by piece.”