"We exchanged drops of blood in each other's cuts. He put a drop into my arm and I put one into his—"

"In the name of heaven, what for?"

"It was a boys' compact. We made a sacred pledge, a bargain. I remember it all perfectly now. We had been reading some dreadful book and we swore to appear to one another—I mean, whoever died first swore to show himself to the other. And we sealed the compact with each other's blood. I remember it all so well—the hot summer afternoon in the playground, seven years ago—and one of the masters caught us and confiscated the knives—and I have never thought of it again to this day—"

"And you mean—" stammered Greene.

But Marriott made no answer. He got up and crossed the room and lay down wearily upon the sofa, hiding his face in his hands.

Greene himself was a bit non-plussed. He left his friend alone for a little while, thinking it all over again. Suddenly an idea seemed to strike him. He went over to where Marriott still lay motionless on the sofa and roused him. In any case it was better to face the matter, whether there was an explanation or not. Giving in was always the silly exit.

"I say, Marriott," he began, as the other turned his white face up to him. "There's no good being so upset about it. I mean—if it's all an hallucination we know what to do. And if it isn't—well, we know what to think, don't we?"

"I suppose so. But it frightens me horribly for some reason," returned his friend in a hushed voice. "And that poor devil—"

"But, after all, if the worst is true and—and that chap has kept his promise—well, he has, that's all, isn't it?"

Marriott nodded.