"I'll see you—see you—later, Jerry," he said drowsily as he turned and staggered up the walk.

Jerry, after an undecided second or two, faced about and began to retrace his steps. He cut through the Ellery back yard and came out on the cross street at whose corner the Fultons lived. The house was a big ramshackle affair of a dozen rooms or so, far too large a place for the Fultons, since there had been only the two of them, Tod's mother having died when he was only a little tad. Indeed, as Tod said, they only used three rooms, the kitchen and two bedrooms. But that was hardly true; there was a big basement under all the house, the most of it used as a workroom, and here it was that the two of them spent the better part of their waking hours.

Mr. Fulton was an odd sort of man, a bit inclined to think his business his own business. But it was no secret among his neighbors that all sorts of queer contrivances were planned and made in that combination machine shop, carpenter shop, forge and foundry below stairs.

Mr. Fulton was an inventor. True, for the most part he invented useless things; he had inherited money and did not need to make any more. But the boys, who were allowed to roam through the workshop at will, were wildly enthusiastic over the ingenious devices schemed out by father and son, for Tod was a chip off the old block.

Now, Jerry did not go up to the front door, even though it was standing ajar. Instead he hurried to the little side porch and reached high up under the eaves, where an electric button was concealed. He pushed it, hard, well knowing that if Mr. Fulton were anywhere in the house he would hear that bell. That was why it had been so well hidden.

But there was no response. Again Jerry rang; he could hear the shrill br-r-r-r of the bell. After a long time he heard footsteps, but something told him they were not those of Mr. Fulton. The door swung open. There stood Mr. Aikens.

"Is Mr. Fulton here," demanded Jerry.

"Asleep," nodded Mr. Aikens.

"I've got to see him."

"All right—if you don't wake him up."