“No,” he said, “I can't make it. I'm too far gone. I had thought—Oh, what a lapse it has been! I am eighty years of age; one year ago I was a boy. If only I had some more brandy. I have some at the house. We must make that. I must show you; there I can give you the details.”

“Hail a cab,” I said. “Here's one now.”

A few minutes later we were before the House of the Blind Spot. It was a two storey drab affair, much like a thousand others, old-fashioned, and might have been built in the early nineties. It had been outside of the fire limits of 1906, and so had survived the great disaster. Chatterton Place is really a short street running lengthwise along the summit of the hill. A flight of stone steps descended to the pavement.

Watson straightened up with an effort.

“This is the house,” he spoke. “I came here a year ago. I go away tonight. I had hoped to find it. I promised Bertha. I came alone. I had reasons to believe I had solved it. I found the Rhamda and the Nervina. I had iron will and courage—also strength. The Rhamda was never able to control me. My life is gone but not my will. Now I have left him another. Do not surrender, Harry. It is a gruesome task; but hold on to the end. Help me up the steps. There now. Just wait a minute till I fetch a stimulant.”

He did not ring for a servant. That I noticed. Instead he groped about for a key, unlocked the door and stumbled into a room. He fumbled for a minute among some glasses.

“Will you switch on a light?” he asked.

Hobart struck a match; when he found it he pressed the switch.

The room in which we were standing was a large one, fairly well furnished, and lined on two sides with bookshelves; in the centre was an oak table cluttered with papers, a couple of chairs, and on one of them, a heavy pipe, which, somehow, I did not think of as Watson's. He noticed my look.

“Jerome's,” he explained. “We live here—Jerome, the detective, and myself. He has been here since the day of the doctor's disappearance. I came here a year ago. He is in Nevada at present. That leaves me alone. You will notice the books, mostly occult: partly mine, partly the detective's. We have gone at it systematically from the beginning. We have learned almost everything but what would help us. Mostly sophistry—and guesswork. Beats all how much ink has been wasted to say nothing. We were after the Blind Spot.”