"That brought me to consider again whether after all there was any proof that his rifle had been used by anyone. Supposing, as I saw no reason to doubt, he spoke the truth when he said that Miss Byrne had misunderstood him and that he had not cleaned the weapon since coming in from stalking, was I driven back on the theory that some one possessed a duplicate key to the case where the guns were kept? Not in the least. The shot might have been fired from a rifle that had never, at any time, been within the walls of the castle. Certainly, the bullet fitted Sir David's Mannlicher rifle, but that, as young Lord Ashiel said himself, was equally true of his own rifle, or probably of a dozen others in the neighbouring forests, since a sporting Mannlicher is a weapon in common use in the Highlands.
"The shot, then, might well have been fired by my hypothetical Russian as far as the rifle was concerned; but he would have found it difficult to borrow Sir David's boots, and it seemed unlikely that any stranger would not only have dared to do so, but afterwards have had the audacity to return them. No, on the whole the footmarks seemed to clear the character of the Russian nation from any reasonable suspicion of being directly concerned in the crime.
"And yet, in spite of reason, I could not help feeling that the Society of the Friends of Man must be at the bottom of the whole thing in some way I had not yet fathomed. I made every inquiry as to whether any foreigner had visited the castle or been seen in the neighbourhood, but the only strangers among the visitors had been Miss Julia Romaninov and Miss Juliet Byrne's French maid, both of whose alibis appeared so far unimpeachable. I had it on Lady Ruth's authority that Miss Romaninov had been in the drawing-room with the other ladies at the time of the murder, and all the servants were at supper in the servants' hall. Otherwise I should have been inclined to look on Julia Romaninov with a suspicious eye, as being the only Russian I knew to be on the spot. The last word the dying man had been able to pronounce, too, was, according to Miss Byrne, 'steps' which might very well have been intended for steppes, and have some connection with the enemies he dreaded.
"With these considerations running in my mind, I made my way to the gun-room, not indeed with much expectation of its having anything to tell me, but as part of the day's work of inspection, which must not be shirked. I took down young Ashiel's rifle to examine. He had told me it was of the same description as his cousin's, and I was not very familiar with the make. It was owing to my wish to see for myself with what kind of weapon the deed had been done that a very important clue fell into my hands.