Its parts are built to order by companies including Creusot and Cail & Co. in France, Pen & Co. and Laird's in England, Scott's in Scotland, Krupp in Prussia, the Motala workshops in Sweden, and Hart Bros. in the United States. Then they are assembled by Nemo's men on a desert island. "Nautilus" returned to this island, where Nemo later helped castaways in the novel "The Mysterious Island". After Nemo dies on board, the volcanic island erupts, entombing the Captain and "Nautilus" for eternity.