“Or, rather,” Ned answered, in the same strain, “why, amid so much that’s ghostly, it can never affirm its separate existence as THE ghost.” And thereupon their invisible housemate had finally dropped out of their references, which were numerous enough to make them promptly unaware of the loss. Now, as she stood on the hearth, the subject of their earlier curiosity revived in her with a new sense of its meaning--a sense gradually acquired through close daily contact with the scene of the lurking mystery. It was the house itself, of course, that possessed the ghost-seeing faculty, that communed visually but secretly with its own past; and if one could only get into close enough communion with the house, one might surprise its secret, and acquire the ghost-sight on one’s own account. Perhaps, in his long solitary hours in this very room, where she never trespassed till the afternoon, her husband HAD acquired it already, and was silently carrying the dread weight of whatever it had revealed to him. Mary was too well-versed in the code of the spectral world not to know that one could not talk about the ghosts one saw: to do so was almost as great a breach of good-breeding as to name a lady in a club. But this explanation did not really satisfy her. “What, after all, except for the fun of the frisson,” she reflected, “would he really care for any of their old ghosts?” And thence she was thrown back once more on the fundamental dilemma: the fact that one’s greater or less susceptibility to spectral influences had no particular bearing on the case, since, when one DID see a ghost at Lyng, one did not know it. “Not till long afterward,” Alida Stair had said. Well, supposing Ned HAD seen one when they first came, and had known only within the last week what had happened to him? More and more under the spell of the hour, she threw back her searching thoughts to the early days of their tenancy, but at first only to recall a gay confusion of unpacking, settling, arranging of books, and calling to each other from remote corners of the house as treasure after treasure of their habitation revealed itself to them. It was in this particular connection that she presently recalled a certain soft afternoon of the previous October, when, passing from the first rapturous flurry of exploration to a detailed inspection of the old house, she had pressed (like a novel heroine) a panel that opened at her touch, on a narrow flight of stairs leading to an unsuspected flat ledge of the roof--the roof which, from below, seemed to slope away on all sides too abruptly for any but practised feet to scale.