The same writer says: "Short of perfect prevision we find that all degrees of this type of clairvoyance exist, from the occasional vague premonitions which cannot in any true sense be called sight at all, up to frequent and fairly complete second-sight. The faculty to which this latter somewhat misleading name has been given is an extremely interesting one, and would well repay more careful and systematic study than has hitherto been given to it. It is best known to us as a not infrequent possession of the Scottish Highlanders, though it is by no means confined to them. Occasional instances of it have appeared in almost every nation, but it has always been commonest among mountaineers and men of lonely life. With us in England it is often spoken of as if it were the exclusive appanage of the Celtic race, but in reality it has appeared among similarly situated peoples the world over, it is stated, for example, to be very common among the Westphalian peasantry. "Sometimes the second-sight consists of a picture clearly foreshowing some coming event; more frequently, perhaps, the glimpse of the future is given in some symbolical appearance. It is noteworthy that the events foreseen are invariably unpleasant ones--death being the commonest of all; I do not recollect a single instance in which the second-sight has shown anything which was not of the most gloomy nature. It has a ghastly symbolism of its own--a symbolism of shrouds and corpse-candles, and other funeral horrors. In some cases it appears to be to a certain extent dependent upon locality, for it is stated that inhabitants of the Isle of Skye who possess the faculty often lose it when they leave the island, even though it be only to cross to the mainland. The gift of such sight is sometimes hereditary in a family for generations, but this is not an invariable rule, for it often appears sporadically in one member of a family otherwise free from its lugubrious influence. "There may be still some people who deny the possibility of prevision, but such denial simply shows their ignorance of the evidence on the subject. The large number of authenticated cases leave no room for doubt as to the fact, but many of them are of such a nature as to render a reasonable explanation by no means easy to find. It is evident that the Ego possesses a certain amount of previsional faculty, and if the events foreseen were always of great importance, one might suppose that an extraordinary stimulus had enabled him for that occasion only to make a clear impression of what he saw upon his lower personality. No doubt that is the explanation of many of the cases in which death or grave disaster is foreseen, but there are a large number of instances on record to which it does not seem to apply, since the events foretold are frequently trivial and unimportant."