London, Hodder and Stoughton, 1929. First edition. Archie and Janet Roylance journey to the Gran Seco in South America to see its copper mines. Danger lurks around every corner as rebels have seized the city (at the instigation of the Roylances?) and Janet is kidnapped! Very slight darkening to spine. Endpapers browned. Occasional foxing, particularly to edges. $75.00.