A butcher's daughter in a small Sussex town ends her nightly prayers with "Oh, God, give me horses, give me horses! Let me be the best rider in England!" The answer to 14-year-old Velvet Brown's plea materializes in the form of an unwanted piebald, raffled off in a village lottery, who turns out to be adept at jumping fences — exactly the sort of horse that could win the world's most famous steeplechase, the Grand National.Richly atmospheric of...