The Spanish Padres, as the Mission priests were called, taught the Indians to plough and seed with wheat the lands belonging to the church or Mission. They used a simple wooden plough, which oxen pulled. When the warm brown earth was turned up, the Indians broke the clods by dragging great tree branches over them. After the fall rains they scattered tiny wheat kernels and covered them snugly for their nap in the dark ground. More rain fell, and soon the soaked seeds waked, and started in slender green shoots to find the sunshine, and day by day the stalks grew stronger and the fields greener. Higher and ever higher sprang the wheat, till summer winds set the tall grain waving in a sea of green billows. Have you ever watched the wind blow across a wheat-field? Over and over the long rollers bend the tops of the grain, that rise as the breeze goes on and bend low again at the next breath of wind. When the hot sun had ripened the grain, and all round the white-walled, red-roofed Mission the fields stretched golden and ready for harvest, the Indians cut the wheat, and scattering the bundles over a spot of hard ground, drove oxen round and round on the sheaves till the wheat was threshed out from the straw. Then Indian women winnowed out the chaff and dirt by tossing the grain up in the wind, or from basket to basket, till in this slow way the yellow kernels were made clean and ready to grind. A curious mill, called an arrastra, ground the grain between two heavy stones. A wooden beam was fastened to the upper stone, and oxen or a mule hitched to this beam turned the stone as they walked round. The first flour-mill worked by water was put up at San Gabriel Mission, and it was thought a wonderful thing indeed. Even in those early days California wheat was known to be excellent, and many ships came on the South Sea, as they then called the Pacific Ocean, to load with grain for Mexico or Boston or England. Since that time our state has fed countless people, and over a million acres of valley and hill lands are green and golden every year with food for the world. To Europe, to the swarming people of China, Japan, and India, to South Africa and Australia, our grain is carried in great ships and steamers, and hungry nations in many lands look to us for bread. For a long time after the Mission days, all the grain had to be hauled to the rivers or sea-coast for shipping. Then the overland railroad was finished, and within the next fifteen years an additional two thousand miles of railways were built in California, and nearly every mile opened up rich wheat land that had never been cultivated. Soon great wheat ranches stretched far over the dry, hot valley plains.