This map shows, in extraordinary detail, the roads, waterways, cities, towns, and topography of mid-19th-century Italy. Just north of the Sicilian island of Pantellaria, a tiny and brief note mentions the mysterious volcanic island of Ferdinandea (a.k.a. Graham Island) that rose out of the sea in 1831 only to sink again a few months later. When the island emerged from the ocean, it was immediately claimed by the Italian and British governments each of whom, in turn, gave it a name. Recent seismic activity in Sicily has prompted speculation that the island may soon rise again, reviving the old territorial dispute.