The Book of Dreams and Ghosts by Andrew Lang, Supernatural 18+

🔖 ". . . Instances of this have already been given in "The Ghost and the Portrait," "The Bright Scar" and "Riding Home after Mess." These were adduced as examples of veracity in hallucinations. Each appearance gave information to the seer which he did not previously possess. In the first case, the lady who saw the soldier and the suppliant did not know of their previous existence and melancholy adventure. In the second, the brother did not know that his dead sister's face had been scratched. In the third, the observer did not know that Lieutenant B. had grown a beard and acquired a bay pony with black mane and tail. But though the appearances were veracious, they were purposeless, and again, as in each case the information existed in living minds, it may have been wired on from them. . . ."