The act was not altogether unaccompanied by a process of ratiocination. Slightly as he understood the bearings of those political schemes, in which his master was engaged, the faithful follower knew that there was reason for secrecy, as well as suspicion in regard to the men, with whom he was brought in contact. It was some vague thought of this kind, that had caused him to take notice of the tracks.
He remembered having conducted all the gentlemen outward by the front door, on their departure, as he had conducted them inward on their arrival. He remembered that all had ridden directly away. Which of them, then, had gone round to the rear of the building, without his having observed them?
There were three distinct sets of footprints, not going towards the back, but returning towards the front. One set had been made by hobnailed shoes. These might be the tracks of one of the three helpers; but the other two were those of gentlemen.
Almost intuitively had the Indian arrived at this conclusion, when his analysis was interrupted by seeing the side door standing open—a circumstance which strengthened his incipient suspicion that there was something in the “sign.”
Without waiting to examine the tracks any further, he glided forward to the doorway; and, stepping inside, traversed the narrow passage which conducted to the antechamber—where Scarthe and his cornet had so silently assisted at the ceremony of the nocturnal assemblage.
The keen eye of the American aboriginal—even under the sombre light of the unused apartment—at once detected evidences of its late occupancy. The unshut doors afforded this; but the deep dust, that for years had been accumulating on the floors, showed traces of having been recently stirred by shuffling feet—leaving no doubt upon the mind of Oriole, that men had been in that room, and had gone out of it, only an hour or two before.
The disturbed spider webs upon the glazed partition did not escape his observation; nor the little spot upon the pane of glass that had been rubbed clean.
Oriole placed his eye to it. He could see the whole of the apartment, late occupied by his master’s guests. He could see that master, now alone—seated before his writing table—utterly unconscious of being observed.
The Indian was about to tap upon the glass, and communicate the discovery he had made; but, remembering his own misfortune, and that he could only speak by signs, he glided back through the passage, with the intention of reaching the library by the front entrance.
Daylight had come down—sufficiently clear to enable him to make scrutiny of the tracks with more exactness; and he lingered awhile retracing them—in the hope of finding some solution of the mystery of their existence. The sun had not yet risen; but the red rays of the aurora already encrimsoned the crests of the surrounding ridges, tinting also the tops of the tall trees that overhung the old dwelling of Stone Dean. The light, falling upon the roosts of the rooks, had set the birds astart, and caused them to commence the utterance of their cheerful cawing.