WITH reference to the letters by Messrs. Darwin and Hawksley in the current number of NATURE (p. 286), I may say that I am very strongly “left-legged” (also strongly right-handed), but so far as I am aware there is not the slightest difference in the lengths of the two limbs. I became aware of the peculiarity when a child, by noticing that on a slide the other boys used to go right foot first, and I left foot. Subsequent attempts to break myself of the habit only resulted in my coming ignominiously to grief, and if I tried now to leap a ditch right foot first I would tumble headlong into it instead of clearing it. The next time I find occasion to kick 1 will try to remember which foot was used. It is right to state, however, that in my case I think there has probably existed from infancy a very slight natural weakness of the right ankle. Attempts with me to walk a straight line with the eyes shut seem invariably to result in my swerving to the left, which appears to be contrary to Mr. Darwin's experience.