chunk: Using information learnt from having overheard the conversation of Laputa and Henriques, Crawfurd infiltrates the cave where the tribal leaders are gathering and witnesses Laputa commencing the rising, wearing the necklet of Prester John, which legitimises his leadership. Crawfurd is captured, but having managed to relay a message to Captain Arcoll, escapes during an ambush and steals the necklet from the hands of Henriques, who is trying to steal it for himself. After running all night, Crawfurd is climbing a ravine in the escarpment up to the plateau above the berg when he is captured again. But he manages first to hide the necklet, which is made of priceless rubies.