In "The Mysterious Island", Captain Nemo identifies himself as Prince Dakkar, son of the Hindu raja of Bundelkhand, and a descendant of the Muslim Sultan Fateh Ali Khan Tipu of the Kingdom of Mysore, famous for the Anglo-Mysore Wars (1767–1799) and Mysorean rocket technology. After the Indian Rebellion of 1857, in which Dakkar lost both his family and his kingdom, the prince devoted himself to scientific research, ultimately building the "Nautilus" and cruising the seven seas with a crew of devoted followers. They gather bullion from various shipwrecks in the ocean, most notably from the hulks of the Spanish treasure fleet sunk during the Battle of Vigo Bay. Nemo claims to have no interest in terrestrial affairs but occasionally intervenes to aid people in distress, e.g., by giving salvaged treasure to participants in the Cretan Revolt (1866–1869) against the island's Turkish rulers … by saving (both physically and financially) a Ceylonese or Tamil pearl diver from a shark attack … by rescuing the castaways in "Twenty Thousand Leagues Under the Seas" … and by covertly protecting another set of castaways in "The Mysterious Island".