Hiergargo
Hiergargo the Magician is the wizard who originally burrowed and built the Hollow Tube.
First named in Tik-Tok of Oz, ch. 13
"Burrowed and built by Hiergargo the Magician, In the Year of the World 1 9 6 2 5 4 7 8 For his own exclusive uses."
What the books say it is
role Magician 1 chapter
On a little silver plate just inside the Tube was engraved the words: "Burrowed and built by Hiergargo the Magician, In the Year of the World 1 9 6 2 5 4 7 8 For his own exclusive uses."
Tik-Tok of Oz, ch. 13