It is true that both Miss Morison and Miss Lamont profess to have known little about the history of the Petit Trianon previous to their visit to Versailles. But their detailed report of the haunting contains statements showing that, subconsciously at any rate, they must have possessed considerable knowledge of the place. Miss Morison admits that she had, as a girl, great enthusiasm for Marie Antoinette, and had read not a little about her, including an article descriptive of her summer home; while Miss Lamont is a teacher of French history, and accordingly must have had rather more knowledge than the average person regarding the life story of Queen Marie. Besides which, and most significant, there was published, just before they went to Versailles, an illustrated magazine article picturing a historical fête in the gardens of the Petit Trianon, with some account of its history. It is worth noting, too, that the two ladies were not haunted in exactly the same way, each of them seeing certain people and scenes that were not visible to the other. On the theory of a supernatural manifestation this would be hard to explain, but the difficulty vanishes if we recognize that the subconscious knowledge of the Trianon possessed by each must necessarily have differed. The problem remains to account for the fact, as distinct from the facts, of the haunting. Why should Miss Morison and Miss Lamont, among all the thousands of visitors to the Petit Trianon, alone have had such an experience? To this, assuredly, there is no answer if one is going to stick to the old-fashioned notion of ghosts and attribute to them objective reality. But the answer is very simple on the modern scientific hypothesis. Miss Morison and Miss Lamont, the psychologist would say, were haunted for the reason that, being of exceptionally romantic, impressionable temperaments, the ideas associated in their minds with the Petit Trianon, appealed to them with such "suggestive" force as to plunge them for the time being into a state of "psychical dissociation," during which their subconsciousness obtained complete control over the upper consciousness, and flooded them with its latent memories of all that they had ever read or heard about the place and its historic residents. In other words, they were as two persons "dreaming awake." The same explanation would obviously apply to the ghostly vision seen on the lawn by Mrs. M. Nor do we need to go beyond the hypothesis of subconscious perception to account for the experiences of Lady Eardley and the guest at the Boston hotel. In the latter case it is necessary to assume nothing more than that the lady who saw the apparition at the elevator entrance perceived her danger without being aware of it, and subconsciously developed the hallucination that enabled her to avoid it.