Moyra Charlton (Yvonne Moyra Graham Charlton) was one of the earliest pony story writers, as well as quite possibly the youngest. Tally Ho was begun when she was just eleven. As well as her horse stories, she also wrote historical novels and a dog story. The books are all beautifully illustrated. Gilbert Holiday, who illustrated her Midnight Steeplechase and Three White Stockings only illustrated one other pony book that I am aware of: Lorna Hill’s Stolen Holiday.