Witch's Window
The witch's window is a magic dormer window in Tattypoo's hut whose blue pane shows the past and whose pink pane shows the future.
First named in The Giant Horse of Oz, ch. 7
Why, the witch's window! Let's have a look through the witch's window!" coaxed Agnes
What the books say it is
appearance curious 1 chapter
In the attic of Mombi's hut was a curious dormer window, its two leaded panes opening out upon the slanting roof. One pane was of blue glass and one of pink.
The Giant Horse of Oz, ch. 7