I had not seen Derek Mason for at least a month when, one June afternoon, a note came from him. I went to his apartment at eight o'clock the same evening. Even about his home there seemed a mystery. He lived alone with one man servant. He had taken quarters in a high-class bachelor apartment building near lower Fifth Avenue, at the edge of Greenwich Village.
All of which no doubt was rational enough, but in this building he had chosen the lower apartment at the ground-floor level. It adjoined the cellar. It was built for the janitor, but Derek had taken it and fixed it up in luxurious fashion. Near it, in a corner of the cellar, he had boarded off a square space into a room. I understood vaguely that it was a chemical laboratory. He had never discussed it, nor had I ever been shown inside it. Unusual, mysterious enough, and that a captain of the British military should be an experimental scientist was even more unusual. Yet I had always believed that for a year or two Derek had been engaged in some sort of chemical or physical experiment. With all his military swagger he had the precise, careful mode of thought characteristic of the man of scientific mind.
I recall that when I got his note with its few sentences bidding me come to see him, I had a premonition that it marked the beginning of something strange. As though the portals of a mystery were opening to me!
Nothing is impossible! Nevertheless I record these events into which I was plunged that June evening with a very natural reluctance. I expect no credibility. If this were the year 2000, my narrative doubtless would be tame enough. Yet in 1929 it can only be called a fantasy. Let it go at that. The fantasy of to-day is the sober truth of to-morrow. And by the day after, it is a mere platitude. Our world moves swiftly.
Derek received me in his living-room. He admitted me himself. He told me that his man servant was out. It was a small room, with leather-covered easy chairs, rugs on its hardwood floor, and sober brown portieres at its door and windows. A brown parchment shade shrouded the electrolier on the table. It was the only light in the room. It cast its mellow sheen upon Derek's lean graceful figure as he flung himself down and produced cigarettes.
He said, "Charlie, I want a little talk with you. I've something to tell you—something to offer you."
He held his lighter out to me, with its tiny blue alcohol flame under my cigarette. And I saw that his hand was trembling.
"But I don't understand what you mean," I protested.