"And to keep it from looking like suicide when you were!" said I, with yet a lingering doubt in my mind.
"Well, then I say you have the finest suicide ever!" declared Uvo Delavoye. "I only wish I knew when he began to think it all out. Was it before he called you in to see the tap that didn't turn off? Or was it the defective tap that suggested the means of death? In either case, when he nailed up his letter-box, it was not, of course, to keep the postman from the door, but to keep the smell of gas inside if he or anybody else did come. That, I think, is fairly plain."
"It's ingenious," I conceded, "whether the idea's your own or Royle's."
"It must have been his," said Delavoye with conviction. "You don't engineer an elaborate fake and get in one of your best bits by accident. No; there was only one mistake poor Royle made, and it was unpremeditated. It was rather touching too. Do you remember my trying to get something from his fingers, just when the knock came?"
I took a breath through my teeth.
"I wish I didn't. What was it?"
"A locket with yellow hair in it. And he'd broken the glass, and his thumb was on the hair itself! I don't suppose," added Delavoye, "it would have meant to anybody else what it must to you and me, Gillon; but I'm not sorry I got it out of his clutches in time."
Yet now he could shudder in his turn.
"And to think," I said at last, recalling the secret and forgotten foreboding with which I myself had entered the house of death; "only to think that at the last I was more prepared for murder than suicide! I almost suspected the poor chap of having killed his wife, and shut her up there!"
"Did you?" said Delavoye, with an untimely touch of superiority. "That never occurred to me."