So people in Oz stopped counting how old they were in years, for years made no difference in their appearance and could not alter their station. They did not get sick, so there were no doctors among them. Accidents might happen to some, on rare occasions, it is true, and while no one could die naturally, as other people do, it was possible that one might be totally destroyed. Such incidents, however, were very unusual, and so seldom was there anything to worry over that the Oz people were as happy and contented as can be.
Another strange thing about this fairy Land of Oz was that whoever managed to enter it from the outside world came under the magic spell of the place and did not change in appearance as long as they lived there. So Dorothy, who now lived with Ozma, seemed just the same sweet little girl she had been when first she came to this delightful fairyland.
Perhaps all parts of Oz might not be called truly delightful, but it was surely delightful in the neighborhood of the Emerald City, where Ozma reigned. Her loving influence was felt for many miles around, but there were places in the mountains of the Gillikin Country, and the forests of the Quadling Country, and perhaps in far-away parts of the Munchkin and Winkie Countries, where the inhabitants were somewhat rude and uncivilized and had not yet come under the spell of Ozma's wise and kindly rule. Also, when Oz first became a fairyland, it harbored several witches and magicians and sorcerers and necromancers, who were scattered in various parts, but most of these had been deprived of their magic powers, and Ozma had issued a royal edict forbidding anyone in her dominions to work magic except Glinda the Good and the Wizard of Oz. Ozma herself, being a real fairy, knew a lot of magic, but she only used it to benefit her subjects.
This little explanation will help you to understand better the story you are reaching, but most of it is already known to those who are familiar with the Oz people whose adventures they have followed in other Oz books.
Ozma and Dorothy were fast friends and were much together. Everyone in Oz loved Dorothy almost as well as they did their lovely Ruler, for the little Kansas girl's good fortune had not spoiled her or rendered her at all vain. She was just the same brave and true and adventurous child as before she lived in a royal palace and became the chum of the fairy Ozma.
In the room in which the two sat -- which was one of Ozma's private suite of apartments -- hung the famous Magic Picture. This was the source of constant interest to little Dorothy. One had but to stand before it and wish to see what any person was doing, and at once a scene would flash upon the magic canvas which showed exactly where that person was, and like our own moving pictures would reproduce the actions of that person as long as you cared to watch them. So today, when Dorothy tired of her embroidery, she drew the curtains from before the Magic Picture and wished to see what her friend Button Bright was doing. Button Bright, she saw, was playing ball with Ojo, the Munchkin boy, so Dorothy next wished to see what her Aunt Em was doing. The picture showed Aunt Em quietly engaged in darning socks for Uncle Henry, so Dorothy wished to see what her old friend the Tin Woodman was doing.
The Tin Woodman was then just leaving his tin castle in the company of the Scarecrow and Woot the Wanderer. Dorothy had never seen this boy before, so she wondered who he was. Also she was curious to know where the three were going, for she noticed Woot's knapsack and guessed they had started on a long journey. She asked Ozma about it, but Ozma did not know
That afternoon Dorothy again saw the travelers in the Magic Picture, but they were merely tramping through the country and Dorothy was not much interested in them. A couple of days later, however, the girl, being again with Ozma, wished to see her friends, the Scarecrow and the Tin Woodman in the Magic Picture, and on this occasion found them in the great castle of Mrs. Yoop, the Giantess, who was at the time about to transform them.