Aunt Ruth's Book, Frank's Autobiography, page 2, paragraph 2

During the winters of 1889 and 1890, my father was called as a missionary school teacher to teach the first Indian School, (so far as I can find out) in Arizona. I went with him sometimes and became acquainted with the Indians and the friendships made there have gone with me through life. It was a beautiful thing to see the love which existed between those Indians and my father.