Yips
The people of the high tableland at the south-east of the Winkie Country, who go to the Frogman for advice.
First named in The Lost Princess of Oz, ch. 3
But on top live the Yips, and although the space they occupy is not great in extent, the wee country is all their own.
What the books say it is
region on a broad tableland 1 chapter
The Yips had never—up to the time this story begins—left their broad tableland to go down into the Land of Oz, nor had the Oz people ever climbed up to the country of the Yips.
The Lost Princess of Oz, ch. 3