Amy Catherine Walton (1849-1939), better known as Mrs O. F. Walton, was a British author of Christian children's and teenage books, mainly but not exclusively fiction. Her career as an author of children's books began in 1870 with My Mates and I, followed by at least two others. Then in 1874 came one of her best known books, Christie's Old Organ, which has been regularly reprinted up to the present day. It is the story of orphaned Christie and his friend the aged organ-grinder Treffy. Although she wrote many more books, it is A Peep Behind the Scenes and Christie's Old Organ which have remained well known, continuing to be published by the Lutterworth Press, successor to her original publisher, the Religious Tract Society, until at least the late 20th century, and later available from other publishers, along with occasional reprints of a few of her other works, such as Saved at Sea (1879), to the present day. Her other works include Christie, The King's Servant (1898) and The King's Cup-Bearer (1891).