Of course we instantly assented. Nothing could have pleased us better than this invitation, for we had long been dying to see the inside of Edmund's laboratory. We all got our hats and started out with him. We knew where he lived, occupying a whole house though he was a bachelor, but none of us had ever seen the inside of it, and our curiosity was on the _qui vive_. He led us through a handsome hallway and a rear apartment directly into the back yard, half of which we were surprised to find inclosed and roofed over, forming a huge shanty, like a workshop. Edmund opened the door of the shanty and ushered us in. A remarkable object at once concentrated our attention. In the center of the place was the queerest-looking thing that you can well imagine. I can hardly describe it. It was round and elongated like a boiler, with bulging ends, and seemed to be made of polished steel. Its total length was about eighteen feet, and its width ten feet. Edmund approached it and opened a door in the end, which was wide and high enough for us to enter without stooping or crowding. "Step in, gentlemen," he said, and unhesitatingly we obeyed him, all except Church, who for some unknown reason remained outside, and when we looked for him had disappeared. Edmund turned on a bright light, and we found ourselves in an oblong chamber, beautifully fitted up with polished woodwork, and leather-cushioned seats running round the sides. Many metallic knobs and handles shone on the walls. "Sit down," said Edmund, "and I will tell you what I have got here." He stepped to the door and called again for Church but there was no answer. We concluded that, thinking the thing would be too deep to be interesting, he had gone back to the club. That was not what he had done, as you will learn later, but he never regretted what he did do. Getting no response from Church, Edmund finally sat down with us on one of the leather-covered benches, and began his explanation. "As I was telling you at the club," he said, "I've solved the mystery of the atoms. I'm sure you'll excuse me from explaining my method" (there was a little raillery in his manner), "but at least you can understand the plain statement that I've got unlimited power at my command. These knobs and handles that you see are my keys for turning it on and off, and controlling it as I wish. Mark you, this power comes right out of the heart of what we call matter; the world is chock full of it. We have known that it was there at least ever since radioactivity was discovered, but it looked as though human intelligence would never be able to set it free from its prison. Nevertheless I have not only set it free, but I am able to control it as perfectly as if it were steam from a boiler, or an electric current from a dynamo." Jack, who was as unscientific a person as ever lived, yawned, and Edmund noticed it. But he showed no irritation, merely smiling, and saying, with a wink at me and Henry: