He knew his two brothers and his two sisters very well.

He had begun to romp with them in a feeble, awkward way, and even to squabble, his little throat vibrating with a queer rasping noise (the forerunner of the growl), as he worked himself into a passion.

And long before his eyes had opened he had learned by touch, taste, and smell to know his mother--a fount of warmth and liquid food and tenderness.

She possessed a gentle, caressing tongue that soothed him when it passed over his soft little body, and that impelled him to snuggle close against her and to doze off to sleep.
Most of the first month of his life had been passed thus in sleeping; but now he could see quite well, and he stayed awake for longer periods of time, and he was coming to learn his world quite well.

His world was gloomy; but he did not know that, for he knew no other world.