Whether there is a difference in the vividness, or any other characteristic which sight would lend, in the dreams of events before and after blindness, is a question to which I could obtain few intelligent and satisfactory answers; but, as far as they go, the tendency of these replies is to show that when blindness ensues close upon the critical period of five to seven years of age, the power of vivid dream-vision is more exclusively limited to the events of the years of full sight; and, as Heermann pointed out, this power is often subject to a comparatively early decay. Similarly, I find that those who lose their sight near the critical age are not nearly so apt to retain color in their dream-vision as those who become blind later on. The average age of "blinding" of twenty-four persons who have colored dream-vision, is 16.6 years, including one case in which blindness set in as early as the seventh year. All who see enough to see color, have colored dream-vision. I also asked those who became blind in youth, or later, whether they were in the habit of giving imaginary faces to the persons they met after their blindness, and whether they ever saw such in their dreams. Some answered in very vague terms, but several undoubtedly make good use of this power, probably somewhat on the same basis as we imagine the appearance of eminent men of whom we have read or heard, but whose features we have never seen. When we remember how erroneous such impressions often are, we can understand how easily it may mislead the blind. Such imaginary faces and scenes also enter into their dreams, but to a less extent than into those of the sighted. Dr. Kitto[20] quotes a letter from a musician who lost his sight when eighteen years old, but who retains a very strong visualizing power both in waking life and in dreams. The mention of a famous man, of a friend, or of a scene, always carries with it a visual picture, complete and vivid. Moreover, these images of his friends are reported to change as the friends grow old; and he feels himself intellectually in no way different from the seeing.