"Certainly," he answered, speaking slowly and with thought.
"Then you believe the thief came from without?"
"I do."
"What about your warning to Lady Ridsdale yesterday evening not to trust her maid?"
I saw his eyes flash. It was the briefest of summer lightning that played in their depths. I knew that he longed to adopt the suggestion that I had on purpose thrown out, but dared not. That one look was enough for me. I had guessed his secret.
Before he could reply to my last remark Lord Ridsdale came up.
"What is to be done?" he said; "the police superintendent insists on our all, without respect of persons, being searched."
"There is nothing in that," I said; "it is the usual thing. I will be the first to submit to the examination."
The police went through their work thoroughly, and, of course, came across neither clue nor diamonds. We presently sat down to breakfast, but I don't think we any of us had much appetite. Lady Ridsdale's eyes were red with crying, and I could see that the loss had shaken both her nerve and fortitude. It was more or less of a relief when the post came in. Amongst the letters I found a telegram for myself. I knew what it meant before I opened it. It was from a man in a distant part of the country whom I had promised to assist in a matter of grave importance. I saw that it was necessary for me to return to town without delay. I was very loth to leave my host and hostess in their present dilemma, but there was no help for it, and soon after breakfast I took my leave. Ridsdale promised to write me if there was any news of the diamonds, and soon the circumstance passed more or less into the background of my brain, owing to the intense interest of the other matter which I had taken up. My work in the north was over, and I had returned to town, when I received a letter from Ridsdale.
"We are in a state of despair," he wrote; "we have had two detectives on board, and the police have moved heaven and earth to try and discover the bracelet—all in vain; not the slightest clue has been forthcoming. No one has worked harder for us than Vyner. He has a small place of his own further down the river, and comes up to see us almost daily. He has made all sorts of suggestions for the recovery of the diamonds, but hitherto they have led to nothing. In short, our one hope now turns upon you, Bell; you have done as difficult things as this before. Will you come and see us, and give us the benefit of your advice? If any man can solve this mystery, you are the person."