About the middle of May Wellington entered Spain, leading the centre division himself, the right being commanded by General Hill, and the left by Sir Thomas Graham, the victor of Barrosa. As they advanced, the French hastily retreated towards Valladolid, thence towards Burgos; and by the 12th of June, Wellington being close on that city, they blew up the fortifications of the castle, and retreated beyond the Ebro, which they hoped to be able to defend. But Wellington left them no time to fortify themselves. On the 14th he crossed the Ebro; on the 16th he was in full march after them towards Vittoria, for they found the Ebro no defence, as they had not time to blow up the bridges. On the 16th and 17th Major-General Alten harassed their rear, and dispersed a whole brigade in the mountains, killing considerable numbers, and taking three hundred prisoners. On the 19th they found the French army, commanded by Joseph Buonaparte, with Jourdan as his second and adviser, drawn up under the walls of Vittoria. It was so placed as to command the passages of the river Zadora, and the three great roads from Madrid, Bilbao, and Logroño. Their left extended to the heights of La Puebla, and behind this, at the village of Gomecha, was posted a reserve. The position was remarkably strong, and commanded by the hills interesting to Englishmen as those where the Black Prince, in his day, had defeated the French army at Najera, commanded by the gallant Duguesclin. Wellington took till the morning of the 21st to reconnoitre the position and to concentrate his army for the attack. [Illustration: FLIGHT OF KING JOSEPH BUONAPARTE FROM VITTORIA. (_See p._ 58.)]