Land of Oz Patchwork Girl of Oz", Dorothy specifies that he cannot speak because he is not a fairy dog. However, in "Ozma of Oz", the chicken Billina acquires speech merely by being swept to the lands near Oz, and in "Dorothy and the Wizard in Oz", the same is true of the kitten Eureka and the cab horse Jim when reaching the land of Mangaboos, a similarly magical land. In "Tik-Tok of Oz", Baum restored the continuity: Toto can speak, and always could, but never bothered to, because it was unnecessary. An additional inconsistency is introduced with "Tik-Tok of Oz": Hank the
Dorothy and the Wizard in Oz Baum's other works. After 1907's "Ozma of Oz," Baum devoted more of his energies to Oz. A 1906 contract between Baum and his publisher called for new Oz books at two-year intervals between 1907 and 1911. In fact, Baum accelerated this schedule, producing "Dorothy and the Wizard in Oz" only a year after the previous book. The effect of this effort on the quality of the resulting work can only be a matter of speculation; but commentators have noted that this fourth Oz book is darker and more troubling than usual. In it, Baum violates his own standard of leaving