TO THE INDIES EASTWARD--PRINCE HENRY AND VASCO DA GAMA Up to the fifteenth century the inhabitants of the Iberian Peninsula were chiefly occupied in slowly moving back the tide of Mohammedan conquest, which had spread nearly throughout the country from 711 onwards.

The last sigh of the Moor in Spain was to be uttered in 1492--an epoch-making year, both in history and in geography.

But Portugal, the western side of the peninsula, had got rid of her Moors at a much earlier date--more that 200 years before--though she found it difficult to preserve her independence from the neighbouring kingdom of Castile.

The attempt of King Juan of Castile to conquer the country was repelled by Joao, a natural son of the preceding king of Portugal, and in 1385 he became king, and freed Portugal from any danger on the side of Castile by his victory at Aljubarrota.

He married Philippa, daughter of John of Gaunt; and his third son, Henry, was destined to be the means of revolutionising men's views of the inhabited globe.