to her, his movements, however, only turning out a success thanks to my assistance. Can it be that he had (what Tiedemann does not even allow his fourteen-months-old child to have possessed) a vague perception of distance, of empty and inhabited space, anterior to personal experience? “He had not yet any idea of the falling of bodies from a height, or of the difference between empty and inhabited space. On the 14th October he still wanted to precipitate himself from heights, and several times he let his biscuit fall to the ground when intending to dip it in his cup.”
The kittens endeavour to climb along the sides of the box, but their idea of height (perhaps an instinctive idea) is not sufficiently determined ; they seem quite astounded at not reaching the goal with the first stroke. At the same time I may be mistaken in my observations; perhaps they went up these four or five centimètres mechanically, because in walking along horizontally they found under their paws the surface of the partition which may have seemed a natural continuation of their road. Perhaps they have no wish to get up to the edge of the box.
28th May.—The grey spots on Riquet’s back are now almost as large as the black ones.
The eyes of both kittens are getting less and less blue ; they are assuming an indistinct
