that they see, though their eyes have been more or less open since yesterday evening.
They have not yet begun to purr.
22nd May.—I went up to the box towards twelve o'clock. Riquet’s left eye, the light blue colour of which I can see, seems to perceive me, but it must be very indistinctly. I wave my hand at ten centimètres from his eyes, and it is only the noise I make and the disturbance of the air that cause him to make any movement.
Both Mitis’ eyes are almost entirely open; I hold my finger near his nose without touching it, I wave it from right to left and left to right, and I fancy I perceive in the eyes—in the eyes more than in the head—a slight tendency to move in the direction of my movements.
23rd May, 7 p.m.—Their movements are less trembling, quicker, and fierce not only because of increased strength and exercise, but because intention, directed by eyesight, is beginning to operate.
The more I observe young animals, the more it seems to me that the external circumstances of their development—alimentation, exercise (more or less stimulated and controlled), ventilation, light, attention to their health and their affective sensibilities, care in breeding and training,—are perhaps only
