He was only about as tall as Dorothy herself, and his body was round as a ball and made out of burnished copper. Also his head and limbs were copper, and these were jointed or hinged to his body in a peculiar way, with metal caps over the joints, like the armor worn by knights in days of old. He stood perfectly still, and where the light struck upon his form it glittered as if made of pure gold.

Ozma of Oz, Chapter 4, "Tiktok the Machine Man" (1907) - Later Oz novels