Dent, London, 1964, 189 pp, illus Sheila Rose
Children’s Book Club, London, 1965
Susan‘s elder sister Leonie is deeply depressed after the death of her horse, and at first refuses to come trekking with Susan. When they turn up to the trek and it turns out that there is no one to lead it, Leonie is persuaded to set aside her resolve never to ride again. Slowly, over the course of the trek, she comes to life again, and they solve several mysteries along the way.