His first plant-hunting expedition in Kansu, northwest China, gave him, he said, the happiest year of his life. It also provided the material for one of his best books, On the Eaves of the World, published in 1917. But his career as plant collector, traveller and serious horticulturist happened almost by accident when it became obvious, even to him, that as a novelist (his preferred metier), he was a disaster. Ms Shulman cleverly shows, though, how the novels provide a key to "the strained calm" of family life at Ingleborough. All his books, she notes, "can be read as open letters of complaint to his parents". The complaints ended in his 40th year, when he died on a plant-hunting trip in Burma.