Evans, London,1962, illus Violet Morgan, cover uncredited. 192 pp.
“Tamsin and her brother John, who is recovering from a serious illness, are sent to spend a few months with their grandmother in Cornwall. They manage to buy an old pony trap and hire a pony with which to explore the surrounding countryside. Tamsin, who loves horses and riding, makes friends with Molly, the girl groom at the stables of a retired Army colonel. The colonel owns a horse, Greenheart, who is entered for the Grand National, and Tamsin, John and Molly discover a plot to injure the horse and its rider.”