More than a year after they left Kansas, they reached the town of Tatsienlu on the border of Tibet. If they could have stuck a pin eight thousand miles long right through the earth, it would have come out not far from where they started. The nearest doctor was seven hundred miles away, so Dr. Shelton decided to live in Tatsienlu until he could find a way to get farther into the closed land of Tibet. Doris and Dorothy were born at Tatsienlu, among mountains that rose more than twenty thousand feet above the level of the ocean, so high that they were covered with snow in July and August. They were used to the strange little "yaks,"—houses covered with goat's hair. They watched their father make brick and saw lumber and teach the men how to build houses like the one he had built for himself. After five years Dr. Shelton was permitted to go farther inland to Batang to start a hospital. When the people heard of the "good doctor" who had come so far across the ocean, and who could do such wonderful things to make sick people well, they came from all over the country to see him. At first he had to use for his operating table a door laid across two tables. Then he and his friends sawed lumber and baked brick and built a hospital. For ten years he lived at Batang, and many thousands of people came there to be helped. [Illustration: DR. SHELTON TREATING A TIBETAN BOY He ministered to all who needed him despite the lack of a hospital. This treatment is being given on a house top.] Then a wonderful thing happened—Dr. Shelton was to go into Lhasa, the capital of the land-without-a-doctor. The Dalai Lama had kept out all missionaries because he was afraid the people would discover that their idols were not true gods and would not give the priests any more money. But now the Dalai Lama himself gave Dr. Shelton permission to come. Before going to Lhasa Dr. Shelton planned to take Mrs. Shelton and Doris and Dorothy to the port of Hongkong, from which they were to sail to America, where the girls were to go to school. It was on this journey that they were starting on this November morning. Mrs. Shelton did not want to say good-by to the people of Batang, whom she loved, so she tried to slip away before daybreak. But as she and the doctor rode along, they found people lined up on either side of the road to bid them good-by. Many had left their homes the night before and had marched ahead so they could stand by the road and see their "big doctor" and his wife and children once more. An escort of twenty-five boys had been sent ahead. All the way from Batang to the Yangtze River, a journey of a day and a half, the people were gathered along the roadside. For thirty-six days Doris and Dorothy rode on their mules. Then they were so tired, their father got chairs for them and they were carried by the servants. One day as they were riding along, Dorothy said: