The islands were first sighted in 1506 by a Portuguese mariner, Tristão da Cunha, although he did not land. He named the main island after himself, Ilha de Tristão da Cunha, which was later anglicised to Tristan da Cunha Island. The first survey of the archipelago was made by the French frigate L’Heure du Berger in 1767. Soundings were taken and a rough survey of the coastline was made. The presence of water at the large waterfall of Big Watron and in a lake on the north coast were noted, and the results of the survey were published by a Royal Navy hydrographer in 1781. The first permanent settler was Jonathan Lambert, from Salem, Massachusetts, who arrived at the islands in 1810. He declared the islands his property and named them the Islands of Refreshment. His rule was short lived, as he died in a boating accident in 1812.