MDMD Gore Vidal's "The OZ Books"

[Terrance]

"Yet Dorothy who returns to the series in the third book, Ozma of Oz
(1907), is somewhat different from the original Dorothy. She is older
and her conversation is full of cute contractions that must have doubled
up audiences in Sioux City...

To get Dorothy back to Oz there is by now obligatory natural disaster.
The book opens with Dorothy  and her uncle on board a ship in Australia.
During a storm she is swept over board...Cranes' Open Boat...

Sounds familiar. 

Dorothy is accompanied by a yellow chicken named Bill. As they are now
in magic country, the chicken talks. Since the chicken is a hen, Dorothy
names her Billina..."how is my grammar asked the yellow hen anxiously." 

Tik-Tok, a clockwork robot...has run down, they wind him up...

This essay is of interest and can be read in NYRB, December 3, 1964