Half-way to Alcobaça the ridge upon which the road runs narrows to a mere knife edge, and on the left hand a wide valley sweeps down suddenly, a bold long hill rising beyond. This is the battlefield of Aljubarrota, upon which John, the Master of Avis, won his crown, and for the second time asserted the independence of Portugal from Castile on the 14th August 1385. From Thomar he had brought all the power that patriotic Portugal could raise, and upon this ridge awaited the attack of the Castilians, who, if once they could pass it, would have all the seacoast of Portugal at their mercy down almost to the mouth of the Tagus. The position is not very dissimilar from that of Bussaco, but upon a smaller scale. The Portuguese right and left flanks were both defended by projecting spurs; upon one of which the English bowmen were posted, and by standing upon the centre of the position it is easy to see, even to-day, how skilfully John the Great had chosen his ground for the decisive struggle, and how difficult it was for the Castilians to succeed. They dared not proceed along the valley leaving this strong force of enemies upon the heights behind them, able to cut them off from their base, and harass them flank and rear; whilst to swarm up these precipitous slopes in the face of a semicircle of determined opponents, and enfiladed by archers on both flanks, seemed inviting defeat. All was against the Spaniards. A mysterious epidemic was prostrating them, the King of Castile was ill, and had to be carried to the battle in a litter, and, above all, the Portuguese were struggling for the independence of their country, whilst the Spaniards were fighting at the behest of a corrupt and unpopular king. So on that fateful morning in August, five hundred and twenty-three years ago, as the chivalry of Castile struggled up these broken slopes, the men upon the ridge from which I look down now over the smiling plain, stood like a steel wall, and with mace and battle-axe, and double-handed swords, clove and smote them, whilst the cloth-yard arrows pierced and bowled them over by hundreds ere they reached the summit. The hearts of the Spaniards failed them, and down the slope they fled, delivered now to carnage and to capture. Ten thousand of them, the best fighting men in Castile, fell, the king barely escaped by flight, whilst half his court were taken. Aljubarrota was won, the house of Avis fixed upon the throne for two hundred years, and the alliance between England and Portugal cemented so strongly as to have lasted unbroken to this day.