The first Europeans to see the island group were a Spanish expedition, who on March 6, 1521, observed a string of islands and sailed between two of them during a Spanish expedition of world circumnavigation under the command of Ferdinand Magellan. Historically, the southern village of Umatac, Guam has been credited as the site of the Spanish landing. As confirmation, a scholarly study of the navigator's diary, now kept in preservation in the Philippines, revealed a drawing of the islands with a tiny island to the south of a much larger island above it. The described placement of the islands confirms that Magellan had actually sailed between Guam and Cocos Island, and not Guam and Rota, as some originally thought. Especially since the Northern areas of Guam do not have safe coves or harbors to anchor. Moreover, the waters of Northern Guam are often times more rough and the currents are even more treacherous in comparison to the safer coves and currents seen throughout South-Western side of Guam.