Probably all these effects had been calculated upon by the individual, whoever he was, who haunted Kinloch Houran to excite and exploit these terrors. Who was he? Even now, so far out of his reach, so emancipated from his influence that he could question and examine it, Walter felt a certain giddiness come over his spirit at this thought, and was glad that one of his fellow-passengers stirred and woke, and made a shivering remark, How cold it was, before he again composed himself to sleep. It was very cold. There was an icy chill in the air which penetrated through the closed windows. But nothing else could come in--nothing else! and it could be but a sudden reflection from his past excitement that made Walter feel for a moment as if another figure sat opposite to him, gazing at him with calm sarcasm, and eyes that had a smile in them. When the giddiness passed off, and he looked again, there was (of course) no one opposite to him, only the dark blue cushions of the unoccupied place. Who was this man then who held a sort of court in Kinloch Houran, and demanded obedience from its proprietor? He was no creature of the imagination. Excited nerves and shaken health might indeed have prepared the mind of the visitor for the effect intended to be produced upon him; but they could not have created the central figure--the powerful personality from whom such influence flowed. Who was he? The circumstances were all favourable for a successful imposture, or even a mystification. Suppose it to be some member of the family aggrieved by the promotion of a far-off branch, some dependent with so much knowledge of the secrets of the race as to be able to play upon the imagination of a novice, with mysterious threats and promises; perhaps, who could tell, a monomaniac, the leading idea of whose delusion was to take this character upon him? Walter's breast lightened a little as he made out one by one these links of explanation. It was characteristic of his time, and the liberality of mind with which modern thought abjures the idea of absolute imposture, that the sudden suggestion of a monomaniac gave him great relief and comfort. That might explain all--a man of superior powers crazed in this one point, who might have convinced himself that he was the person he claimed to be, and that it was the interest of the family he had at heart. Such a being, acquainted with all the mysterious passages and hiding-places that exist in such old houses, able to appear suddenly from a secret door or sliding panel, to choose moments when nature herself added to the sense of mystery, hours of twilight and darkness when the half-seen is more alarming than anything fully revealed--this would explain so much, that the young man for the moment drew a long breath of relief, and felt half-consciously that he could afford to ignore the rest.