A new, fully-illustrated edition designed to celebrate the 75th anniversary of this classic account of botanical exploration in Tibet in 1924-5. Little explored and virtually inaccessible, the Tsangpo Gorge in south-east Tibet is the world"s deepest. Through it twists the Yarlong Tsangpo, Tibet"s great river, emerging far below on the plains of India. This is the story of its exploration and the flora and fauna found there.