Dr Ridgewell, a British explorer, lives with the Arumbayas. He finds their society fascinating and seeks to learn from them. Ridgewel in kind has also taught the Arumbayas in modern ways too, such as the game of golf and warns them of the perils of alcohol consumption, however, they had trouble adapting to the modern ways. He chose to stay permenantly, leading local San Theodorans (such as Don José Trujillo) to believe he was killed by the Arumbayas. The Arumbayas would also later feature in Tintin and the Picaros, where they aid General Alcazar's forces, the Los Picaros against General Tapioca's dictatorship. Their fate after Alcazar's coup is unknown.