"The same trick, as you say, Mr. Addison; with one trifling variation, a device which would only suggest itself to such a brain as that of—"
"Dr. Damar Greefe!" I cried.
"I believe you are right."
And now fell an awesome silence; for whilst Gatton and I stood bare-headed, the unfortunate Eric Coverly was being carried out to the waiting car; and even as I turned my eyes away in horror from that spectacle, I was endeavoring to frame the words in which I should acquaint Isobel with this second ghastly tragedy.
Here, indeed, was a new development of "the Oritoga mystery"; and so queerly does the mind depart from the actualities at such a moment that I found myself thinking, even whilst Gatton was talking to me, of the bold head-lines which would greet readers of the press in the morning—and of the renewed excitement which would sweep throughout the length and breadth of the land when this dreadful alibi was proven.
Over the details of that gruesome tragedy I feel myself compelled to pass lightly, for even now the horror of it remains with me. The fumes of the poisonous gray mist lingered for hours in the house; and there were official visitations, testimonies and attestations, and the hundred and one formalities which invariably accompany such a tragedy but which I need not deal with in detail here.
Coates returned with the Rover, just as the body of the victim was being removed, and his account of what had occurred was simple enough, and followed the lines which we had anticipated. He had locked up and then gone to the garage for the car as I had directed him to do, returning to the cottage in time to admit Eric Coverly, whom he showed into the study, having informed him that I should be back in less than ten minutes. He had then proceeded to Denmark Hill railway station only to find, as I had found, that the appointment was a hoax and "the man with a box" a myth.
"You see," said Gatton, "the scheme of the plotter was simply this: to get Coates out of the way for a long enough time to allow the substitution of the telephone to be accomplished. The fact that Coates had closed the windows before leaving the house didn't interfere very much with the scheme. It's an old-fashioned catch on the ante-room window, and I have seen the marks upon the brass-work where it was forced from the outside with the blade of a knife. For the person who opened the window to take out the real telephone and put the other in its place was easy; and all that remained was to lift the gas-cylinder on to the shed and partly reclose the window as we found it. Coates, even if he had troubled to look, would not have noticed any difference in the dusk. It is the next move, however, which I find most interesting."
Gatton spoke with repressed excitement, and:
"What do you mean by 'the next move'?" I asked.