Timothy's Quest by Kate Douglas Wiggin

When the snores of the two watchers fell on the stillness of the death-chamber, with that cheerful regularity that betokens the sleep of the truly good, a little figure crept out of the bed in the adjoining room and closed the door noiselessly, but with trembling fingers; stealing then to the window to look out at the dirty street and the gray sky over which the first faint streaks of dawn were beginning to creep.

It was little Timothy Jessup (God alone knows whether he had any right to that special patronymic), but not the very same Tim Jessup who had kissed the baby Gay in her little crib, and gone to sleep on his own hard bed in that room, a few hours before. As he stood shivering at the window, one thin hand hard pressed upon his heart to still its beating, there was a light of sudden resolve in his eyes, a new-born look of anxiety on his unchildlike face.