L. Frank Baum,
The Magic of Oz — Chapter 22: Ozma's Birthday Party
(1919)
“ When Dorothy and Trot and Betsy Bobbin and Ozma were together, one would think they were all about of an age, and the fairy Ruler no older and no more "grown up" than the other three. She would laugh and romp with them in regular girlish fashion, yet there was an air of quiet dignity about Ozma, even in her merriest moods, that, in a manner, distinguished her from the others. The three girls loved her devotedly, but they were never able to quite forget that Ozma was the Royal Ruler of the wonderful Fairyland of Oz, and by birth belonged to a powerful race. ”
