Then it grew very cold, and Peter would come up early in the morning blowing on his fingers to keep them warm. But he soon left off coming, for one night there was a heavy fall of snow and the next morning the whole mountain was covered with it, and not a single little green leaf was to be seen anywhere upon it. There was no Peter that day, and Heidi stood at the little window looking out in wonderment, for the snow was beginning again, and the thick flakes kept falling till the snow was up to the window, and still they continued to fall, and the snow grew higher, so that at last the window could not be opened, and she and her grandfather were shut up fast within the hut. Heidi thought this was great fun and ran from one window to the other to see what would happen next, and whether the snow was going to cover up the whole hut, so that they would have to light a lamp although it was broad daylight. But things did not get as bad as that, and the next day, the snow having ceased, the grandfather went out and shovelled away the snow round the house, and threw it into such great heaps that they looked like mountains standing at intervals on either side the hut. And now the windows and door could be opened, and it was well it was so, for as Heidi and her grandfather were sitting one afternoon on their three-legged stools before the fire there came a great thump at the door followed by several others, and then the door opened. It was Peter, who had made all that noise knocking the snow off his shoes; he was still white all over with it, for he had had to fight his way through deep snowdrifts, and large lumps of snow that had frozen upon him still clung to his clothes. He had been determined, however, not to be beaten and to climb up to the hut, for it was a week now since he had seen Heidi. "Good-evening," he said as he came in; then he went and placed himself as near the fire as he could without saying another word, but his whole face was beaming with pleasure at finding himself there. Heidi looked on in astonishment, for Peter was beginning to thaw all over with the warmth, so that he had the appearance of a trickling waterfall. "Well, General, and how goes it with you?" said the grandfather, "now that you have lost your army you will have to turn to your pen and pencil." "Why must he turn to his pen and pencil?" asked Heidi immediately, full of curiosity. "During the winter he must go to school," explained her grandfather, "and learn how to read and write; it's a bit hard, although useful sometimes afterwards. Am I not right, General?" "Yes, indeed," assented Peter.