It remains but to add, in connection with our household ghosts, that the method of exorcising such goblins in Wales is explicit. The objectionable spectre must be conjured, in the name of Heaven, to depart, and return no more. Not always is this exorcism effective; the ghost may have a specific purpose in hand, or it may be obstinate. The strength of the exorcism is doubled by employing the Latin language to deliver it; it receives its utmost power, however, through the clergy; three clergymen, it is thought, will exorcise any ghost that walks. The exorcism is usually for a stated period; seven years is the favourite time; one hundred years the limit. There are many instances where a ghost which had been laid a hundred years returned at the end of the time to its old haunts. In all cases it is necessary the ghost should agree to be exorcised; no power can lay it if it be possessed of an evil demon--a spirit within a spirit, as it were--which stubbornly refuses to listen to argument. In such cases the terrors of Heaven must be rigorously invoked; but the result is only temporary. Properly constituted family ghosts, however, will lend a reasonable ear to entreaty, backed by prayer. There are even cases on record where the ghost has been the entreater, as in the story of Haunted Margaret.