History of Arda meme » Foundation of the realms in exile (II 3320)
The last leaders of the Faithful, Elendil and his sons, escaped from the Downfall [of Numenor] with nine ships, bearing a seedling of Nimloth, and the Seven Seeing-stones (gifts of the Eldar to their House); and they were borne on the wings of a great storm and cast up on the shores of Middle-earth. There they established in the North-west the Númenorean realms in exile, Arnor and Gondor. Elendil was the High King and dwelt in the North at Annúminas; and the rule in the South was committed to his sons, Isildur and Anárion. They founded there Osgiliath between Minas Ithil and Minas Anor,not far from the confines of Mordor.