L. Frank Baum,
The Tin Woodman of Oz — Chapter 24…
(1918)
“ If he went with the Tin Woodman to the Emperor's castle, she felt that the two tin men might not be able to live together in harmony, and moreover the Emperor would not be so distinguished if he had a double constantly beside him. So she asked Captain Fyter if he was willing to serve her as a soldier, and he promptly declared that nothing would please him more. After he had been in her service for some time, Ozma sent him into the Gillikin Country, with instructions to keep order among the wild people who inhabit some parts of that unknown country of Oz. ”
