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No. 4]
INTERNAL SPEECH AND SONG.
407
movement by certain anæsthetics when the eyes (or ears) are closed (die sogenannte 'conscience musculaire,' Zeitsc. für Psych., IV, 1892, 161 ff.) that I need not do more than recognize the support which my article gets from his. As to the interpretation of the facts, I hope that the principle urged in this paper may be found to take us a step further. A collection of cases which show the extreme dependence of attention and voluntary movement, in persons of the visual type, upon vision, is made by Dr. Ireland in Journal of Ment. Sci., Jan. '93, pp. 130 f. The extraordinary patient of Dr. Grainger Stewart of Edinburgh, whose case Dr. Ireland cites, I myself had the pleasure of examining, through the kindness of Dr. Stewart.
