Columbus's first landfall in what was to Europeans a 'New World' was on an island he named San Salvador (known to the Lucayans as ''Guanahani''). Whilst there is a general consensus that this island lay within The Bahamas, precisely which island Columbus landed on is a matter of scholarly debate. Some researchers believe the site to be present-day San Salvador Island (formerly known as Watling's Island), situated in the southeastern Bahamas, whilst an alternative theory holds that Columbus landed to the southeast on Samana Cay, according to calculations made in 1986 by ''National Geographic'' writer and editor Joseph Judge, based on Columbus's log. On the landfall island, Columbus made first contact with the Lucayans and exchanged goods with them, claiming the islands for the Crown of Castile, before proceeding to explore the larger isles of the Greater Antilles.