Because its American theatrical release was limited, and she was extremely proud of this movie, Coral Browne went on a self-funded promotional tour.
The scene where Alice is sitting to be photographed dressed in a Chinese dress is not true. The girl who actually sat for that picture was Alexandra (Xie) Kitchin, described as Lewis Carroll's favorite model.
The character of Lucy was entirely fictional. When Alice Liddell Hargreaves came to the U.S. to celebrate Lewis Carroll's birth, she was accompanied by her son Caryl and her sister Rhoda.