What day was the book published that was illustarted alongside Dorothy and the Wizard in Oz?
Dorothy and the Wizard in Oz:  This is one of only two of the original fourteen Oz books (the other being "The Emerald City of Oz" (1910), to be illustrated with watercolor paintings. The Emerald City of Oz:  Originally published on July 20, 1910, it is the story of Dorothy Gale and her Uncle Henry and Aunt Em coming to live in Oz permanently.
July 20, 1910