Of the vividness of impressions made in dreams, illustrations are plentiful. Dr. Abercrombie first told the often quoted story of the English army officer whose susceptibility was so remarkable that “his friends could produce any kind of dream they pleased by softly whispering in his ear.” On one occasion they led him, in this way, through a long quarrel, which threatened to end in bloodshed. Just as the dreamer was to meet his enemy a pistol was handed to him; he fired it off in his sleep, was awakened by the report, and repeated to his laughing friends the fancies they had whispered to him a moment before. A well authenticated case is on record of a young Englishman who, at the age of twenty-eight, through disease, lost the power of speech for four years. He dreamed that he fell into a cauldron of boiling beer, and in his agony and fright shrieked for help. Of course, he at once awoke, and from that moment the use of his tongue was fully recovered. A bottle filled with warm water, which touched the feet of Dr. James Gregory after he had fallen asleep, produced an awful vision of a bare-footed tramp over the hot crater of Mount Ætna, through clouds of sulphurous vapors, and amid spurtings of scalding lava. Because of a blister on the head of Dr. Reid, he “positively endured all the physical torture of being scalped, while dreaming that he had fallen into the hands of a party of red Indians.” A lady dreamed that a man entered her chamber, and tightly clasped her left hand in his without offering her further violence or uttering a word of explanation. She remonstrated with him in vain; she shrieked for help, but could not make herself heard; then began a desperate struggle with the imaginary stranger, which culminated in awaking the sleeper—but not in releasing her hand, which, to her great alarm, was still held as in a vise. Summoning all her will-power, she rose from her couch and crossed the room, and it was only when she attempted to light a lamp that she discovered that she was holding her own hand with the other, which had become numb by the tightness of the grasp.