Uncle Henry is a fictional character invented by L. Frank Baum. He is introduced in Baum's first Oz book titled The Wonderful Wizard of Oz, published in 1900. Henry is the old uncle of Dorothy Gale and the hardworking husband of Aunt Em. He lived with his wife and niece on a small, isolated farm in circa 1899-1900 Kansas. In Baum's later Oz books, when the lovely child Queen of Oz Princess Ozma became Dorothy's best friend and crowned her as an official Princess of Oz, Henry and Em eventually abandoned their farm forever and moved to the magical Land of Oz to escape all the troubles of our world and live happily ever after.