"How's that?" asked Craig, falling in with the man's evident desire to change the subject.

"Why, I believe their alarm system's out of order," he replied. "Some of the fine wires in it burnt out, I think. Defective wiring, I guess. Oh, they've had it patched up, changed about a little,—it's all right now, they say. But they've had a deuce of a time with the alarm ringing at all sorts of hours, and not a trace of trouble."

I looked quickly at Craig. Though the superintendent thought he had been very clever in changing the topic of conversation, he had unwittingly furnished us with another clew. I could not ask Craig before him and I forgot to do so later, but, to me at least, it seemed as if this might be due to induction from the stray currents.

"No one here seems to have suspected the Creighton motor, anyhow," commented Craig to me, as we thanked the superintendent and walked across to the elevators.

We rode up to Tresham's office, which was on the third floor, on the side of the building toward Creighton's laboratory. In fact one of the windows opened almost on the roof of the brick building next door.

We found Tresham in his office and he received us affably, I thought. "Miss Laidlaw told me she was going to consult you," he remarked as we introduced ourselves. "I'm glad she did so."

Tresham was a large, well-built fellow, apparently athletically inclined, clean shaven with dark hair that was getting very thin. He seemed quite at ease as he talked with us, yet I could tell that he was weighing us all the time, as lawyers will do.

"What do you think of Creighton's motor?" opened Kennedy. "You've seen it, I suppose?"

"Oh, yes," he replied quickly and jerkily. "Since Miss Laidlaw became interested he's been in here to have me look over his application for a patent. You know, I used to be a patent lawyer for a number of years until I decided to branch out into general practice. Legally Creighton seems to be sound enough. Of course, you know, the patent office won't grant a patent on a machine such as he claims without a rigid demonstration. He needs money, he says, for that. If his idea is sound, I don't see any reason why he shouldn't get a basic patent."

Tresham paused. I was conscious that he was furtively watching the face of Kennedy as though he hoped to learn as much from him as Craig did on his part.