"It was when I came upon the footprints in the rose-bed which had done so much to prove the guilt of Sir David Southern in the eyes of his accusers, that I began to be certain of his innocence; and a very little examination convinced me absolutely that whoever had shot Lord Ashiel it was not his youngest nephew. For the tracks on the flower-bed left no room for doubt.
"It is true they corresponded exactly with the shooting-boots Sir David had been wearing on the day the crime was committed. I had provided myself with a pair that I was assured was exactly like those particular boots which fitted the tracks and which the police had taken away with them, and I found that there was indeed no difference, except for the matter of an extra nail or two on the soles. There was no doubt that Sir David's boots had made those impressions, but to my mind there was equally no doubt that Sir David had not been in them when they made them. For the track which was so plainly distinguishable on the soft mould of the flower-bed had certain peculiarities which I could hardly overlook.
"There was first a row of footmarks leading from the lawn to the middle of the bed; then more marks as if the wearer of the boots had moved from one position to another hard by; and finally, a track leading back again to the mossy lawn at the side. Now all this was well enough till it came to the last row of footsteps, those which led off the bed, and which had presumably been taken after the fatal shot was fired. But was it conceivable that a man who had that moment committed a cold-blooded murder should leave the scene of his crime with the same slow, deliberate footsteps with which he had approached it? Surely not.
"And yet this is what the wearer of the boots had done. The imprints, as they advanced towards the lawn, were deep and well defined from toe to heel. Not only that, but they were, if anything, closer together than those which preceded them. Now a man, running, leaves a deeper impression of his toe than he does of his heel, and his steps are much farther apart in proportion to his increase in speed. I, myself, ran from the middle of the bed, to the lawn, alongside of the footmarks of the soi-disant murderer, and though I am a short man, while Sir David's legs are reported long, I left only two footprints to his five. To me it was as certain as if I had seen it happen that the wearer of the boots trampled his way off the rose-bed as slowly as he had trampled on. Those footprints had been made by some one who was determined they should be seen, not by some one whose only thought was to get away from the place; not, in short, by a man who had that moment fired a murderous shot through the darkness. The tracks had undoubtedly been made as a blind and with the intention of diverting suspicion to the wrong man probably after the deed itself was done.