"I returned to the cottage with the papers, and found two telegrams. One was from the analyst in Edinburgh to whom I had sent the grains of dust collected in the gun-room, saying that among other ingredients lime was very predominant. Now there is no lime in a peaty soil such as this, and the gardener, to whom I talked of soils and manures, with an air of wisdom which I hope deceived him, told me that the rose-bed outside the library had received a strong dressing of it. There was also, said the report, traces of steel and phosphates, of which there is a combination known as basic slag, which the gardener had mentioned as being occasionally used. I considered that it was tolerably certain, therefore, that young Ashiel's rifle had been the weapon the imprint of whose butt was still discernible on the bed when I went over it.
"The second telegram contained an answer from the colonel of his regiment, to whom I had written asking if there was anything in the record of Mark McConachan which would make it appear conceivable that he was badly in need of money, and likely to go to extreme lengths to obtain it. I had told the colonel as much about the case as I then knew, and pointed out that the life or death of a man whom I had strong reason to think innocent might depend upon his withholding nothing he might know which could possibly bear upon the matter. The telegram I received in reply was short but emphatic. 'Record very bad,' it said, 'am writing,' This was enough for me. I went over to Crianan, saw the police, and imparted my conclusions to the local inspector. I then proposed that a little trap should be laid, into which, if he were not guilty and had no intention of destroying his uncle's will, there was no reason to imagine young Lord Ashiel would step. The inspector consented, and I returned, with himself and two of his men, to Inverashiel. You know how successful was the ruse I indulged in. I simply went to the young man, and told him I had discovered the place where his uncle had put his will and other valuable papers. I explained to him where it was and how the pedestal could be opened, but I said nothing about its shutting again. Neither, I am afraid, did I confess that I had already visited the statue and taken away the documents. I said, on the contrary, that I preferred not to touch the contents except in the presence of a magistrate, and suggested he should send a note to General Tenby at Glenkliquart to ask him to come over and be present when we removed the papers. This he did, and I then left him after he had promised to join us at the cottage in a couple of hours. I knew very well where we should find him at the end of those hours; and, as I expected, he was caught by the clockwork machinery of the pedestal door."