L. Frank Baum,
The Lost Princess of Oz — Chapter 12…
(1917)
“ They wore uniforms of blue and yellow and were armed with clubs as big around as tree-trunks. Each giant had around his neck a broad band of gold, riveted on, to show he was a slave.As our friends entered riding upon the Lion, the Woozy, the Sawhorse and the Mule, the giants half turned and walked in two files on either side of them, as if escorting them on their way. It looked to Dorothy as if all her party had been made prisoners, for even mounted on their animals their heads scarcely reached to the knees of the marching giants. ”
