The eyes of both kittens are getting less and less blue; they are assuming an indistinct colour, between dirty grey and light brown. Their expression is frank and sympathetic; they seem to direct their looks consciously and voluntarily.
Riquet is looking at me with an expression of pleasure, seated upright, with his paws lifted languidly. I hold my finger near him, and he extends his left paw. I stroke the left side of his head, and he leans the part which I caress on my finger, as a full-grown cat would do, and rubs himself two or three times running against my finger. These are invented movements—I mean movements furnished all of a sudden by the stimulus of hereditary virtualities, and which seem to astonish the young animal as well as to please him; it is thus that we see automatic movements at one moment coming under the control of consciousness, and the next escaping from it, refined, simplified, adapted, and perfected. Life invents but few new movements; but there are many, no doubt, ready to appear if the influences of surroundings permitted it.
29th May.—They are learning more and more to exercise their muscles and perfect their movements; they are daily acquiring fresh powers and adaptations, and in their games with each other and their mother they show intention and pleasure; they are learning more and more to distinguish people; if any one presents a finger to them, they always hold out their nose, or else a paw; this seems to have become a reflex action with them. They also appear to localise certain sensations which are in some sort artificial. I touch the tip of Mitis’ left paw, (he has been sucking for the last ten minutes); he stops sucking, and instantly turns his head in the direction of his paw; but this is perhaps because he has seen my hand, and the muscular sensation associated with this visual sensation may have determined his movement alone and almost automatically. I vary the experiment, however, and pass my finger two or three times running across his neck; he raises his head and looks behind him, as if understanding where I had touched him. However this may be, I should not like to affirm in him the faculty of localising pleasure or pain, except as a sort of automatic localisation of sensations, which would be the result of certain anterior adaptations.
The mother is engaged on the toilet of Mitis, who neither looks pleased nor displeased; he makes a sound which is neither a cry of pain, nor the whining of complaint or anger; if he is giving expression to a mental condition well defined to himself, I cannot guess at it. It is a tremulous noise which might be represented by the following letters: mrrrimr....
2nd June.—Riquet’s ears grow more than those of Mitis. The hair of the latter has ceased to grow, and his tail is scarcely more bushy than his brother’s. He will not be more of an Angora than Riquet, in spite of the long silky hair, which during the first days grew so abundantly on his neck, stomach, and thighs.
Riquet has become more patient, and Mitis more lively during the last few days. It would be very presumptuous to pretend to found precise inductions as to the future on observations taken during the first days; hypothesis itself must maintain the most scrupulous reserve, especially as regards predictions concerning intelligence and character. A cat which appears very intelligent at the age of one or two months, often shows very mediocre intelligence when a year or two old, and vice versâ. As to the colour and nature of the hair, six weeks must have elapsed before one can give any certain opinion as to the real shade that it will be, and as to its flexibility, abundance, brilliancy, and waviness. As for the ears I have often erred in my predictions ... which are scarcely perceptible at birth, and during the first eight or ten days, will sometimes grow to a disproportionate length afterwards. With regard to the paws and the tail, half a decimètre’s length at the moment of birth indicates undoubtedly an appreciable length later on. One can also determine on the first day the future firmness of the muscles and bones by the relative resistance of these little velvety lumps when held in the hand. A strong voice, which is more especially the appendage of male kittens, indicates at any rate good lungs.
Mitis, who is so gentle, has more flattened ears than Riquet; the latter’s stand up more like those of foxes and wolves. The little complementary pavillion ... which is attached to both edges of the ear, slightly towards the bottom, and which in man is designated by a slight rudimentary excrescence, is beginning to appear in both my kittens.
They are now well advanced in the art of play; they fence well with their paws, lick each other, and tumble and roll each other over. Riquet, who has some difficulty in standing upright on his legs, has attempted a jump. They try to bite each other at play, specially aiming at each other’s paws. Often by mistake they seize their own paws with their teeth and gnaw at them; but they are not long in finding out their error.
I place them on the ground. They tremble, seem frightened, or rather astonished, or undecided, and make a few uncertain movements. One of them perceives the mother at a distance of about a mètre, looking at them from under a chair. He goes straight up to her, but very slowly, and with a great deal of waddling; all of a sudden he stops. He has heard his brother’s voice, the latter having whined on my touching him to rouse him out of his persistent immovability; he turns his head in our direction, distinguishes me, turns straight round, and comes up to me with much greater rapidity and assurance than he had shown in going to his mother. The reason of this is, that the road to me was shorter and surer, and the stimulus to traverse it greater, owing to the larger proportions of my body. I place them back in the box, and they begin playing again with zest. The one who had only moved feebly on the floor, walks, and even jumps, much better this morning. This little outing seems to have stimulated him to an effort which he had not made before. In like manner we sometimes note progress in young children from day to day.
They can now climb up to the middle of the box.