The next morning the sun came out early as bright as ever, and then Peter appeared with the goats, and again the two children climbed up together to the high meadows, and so it went on day after day till Heidi, passing her life thus among the grass and flowers, was burnt brown with the sun, and grew so strong and healthy that nothing ever ailed her. She was happy too, and lived from day to day as free and lighthearted as the little birds that make their home among the green forest trees. Then the autumn came, and the wind blew louder and stronger, and the grandfather would say sometimes, "To-day you must stay at home, Heidi; a sudden gust of the wind would blow a little thing like you over the rocks into the valley below in a moment." Whenever Peter heard that he must go alone he looked very unhappy, for he saw nothing but mishaps of all kinds ahead, and did not know how he should bear the long dull day without Heidi. Then, too, there was the good meal he would miss, and besides that the goats on these days were so naughty and obstinate that he had twice the usual trouble with them, for they had grown so accustomed to Heidi's presence that they would run in every direction and refuse to go on unless she was with them. Heidi was never unhappy, for wherever she was she found something to interest or amuse her. She liked best, it is true, to go out with Peter up to the flowers and the great bird, where there was so much to be seen, and so many experiences to go through among the goats with their different characters; but she also found her grandfather's hammering and sawing and carpentering very entertaining, and if it should chance to be the day when the large round goat's-milk cheese was made she enjoyed beyond measure looking on at this wonderful performance, and watching her grandfather, as with sleeves rolled back, he stirred the great cauldron with his bare arms. The thing which attracted her most, however, was the waving and roaring of the three old fir trees on these windy days. She would run away repeatedly from whatever she might be doing, to listen to them, for nothing seemed so strange and wonderful to her as the deep mysterious sound in the tops of the trees. She would stand underneath them and look up, unable to tear herself away, looking and listening while they bowed and swayed and roared as the mighty wind rushed through them. There was no longer now the warm bright sun that had shone all through the summer, so Heidi went to the cupboard and got out her shoes and stockings and dress, for it was growing colder every day, and when Heidi stood under the fir trees the wind blew through her as if she was a thin little leaf, but still she felt she could not stay indoors when she heard the branches waving outside.