back to the Boomerang, and I was equally determined that, if I could help it, you should not go alone. Only I could not be quite sure how you managed to get there, and at last I hit upon a little device for finding out. There is no such person as Professor Dibbs, Peter; I invented him to put you off your guard. As I passed into the other room with the lamp, I saw you, reflected in the mirror over the study chimneypiece, rise and go to the drawing-room mantelpiece: you had a slip of paper in your hand—a cheque, of course. I had the cheque I tore out hidden in the waistband of my dress; and so, as soon as I saw you slip your cheque behind the clock in the drawing-room, I put my cheque behind the one in the study. I was on the deck at once, and it was dark, but I could hear your voice and another's—round a corner. I held my breath and listened. What I heard, you know!"
Peter shrank up in his chair, utterly confounded by this last vagary on the part of the Time Cheques. He certainly would not have supposed that the mere presentation even of a "bearer" cheque by Sophia would entitle her
