“How long, sir? I’d say about twenty minutes before you came. Maybe twenty-five. I wasn’t paying any particular attention, sir. She just got the key and went in. After a few minutes I heard something buzzing in there, and I thought maybe Mr. Butler was showing her some new gadget of his, like he was always doing. Then there was a telephone call for him, and I couldn’t make neither of them answer; that’s when Mr. Perrin and I began to get worried.”

“I see.” Perrin came hurrying up with the ax, and I motioned them aside. I swung the ax, and the head of the weapon crashed against the lock. The knob dropped to the floor with a clatter, but the door gave not at all.

I brought the ax down again, and something cracked sharply. The third blow sent the door swinging wide.

Cautiously, fearing I know not what, I entered the familiar room. Nothing, apparently, had been disturbed. There was no sign of disorder anywhere. The blankets on the narrow cot in the corner of the room had not been unfolded.

But neither Vic nor Hope were anywhere in sight.

You and Mrs. Perrin stay there by the door,” I suggested. “I don’t know what’s wrong here, but something’s happened. There’s no need for all of us entering.”

My second glance around the room was more deliberate. To my right were the big generators and the switchboards, gleaming with copper bus-bar, and intricate with their tortuous wiring. Directly before me was the long work-bench that ran the full length of the room, littered with a dozen set-ups for as many experiments. At my left was a sizable piece of apparatus that was strange to me; on a small enameled table beside it was a rather large sheet of paper, weighted down with a cracked Florence flask.

In a sort of panic, I snatched up the paper. Vic had said in his note, that he would leave another note for me here. This was it, for in a bold scrawl at the top was my name. And in hardly decipherable script, below, was his message:

Dear Pete:

First of all, let me say that you’ve no particular call to do anything about this. If I’m in a jam, it’s my own doing, and due to my bull-headedness, of which you have so often reminded me.