On Monday the 22nd of February 1367 the first division crossed the Pyrenees by the Pass of Roncesvalles. The next two followed it on the two succeeding days, and the whole force was reunited at Pampeluna. The Prince had now two lines of operations open to him, both leading to his objective, Burgos; the one by Vittoria and Miranda on the Ebro, the other by Puente la Reyna and Logrono. He chose the former, the identical line followed in the contrary direction by Wellington in chase of the beaten French, and sent only a small detachment of volunteers under Sir Thomas Felton along the latter route. This party of Felton's deserves mention as the first body of English irregular cavalry under a reckless and daring officer. No exploit was too hare-brained for them and they did excellent service, for they were the first to find contact with the Spanish army, at Navarete, and having obtained it they preserved it, keeping the Prince admirably informed of the enemy's movements. Henry of Trastamare, on learning the advance of the English, crossed the Ebro and marched on Vittoria, but finding that the Black Prince had been beforehand with him fell back on Miranda. Felton's volunteers stuck to him so persistently and impudently during this retreat that the Spaniards at last lost patience and attacked them in overwhelming force. The English, a mere hundred men, were too proud to retire but stood firm on the hill of Arinez, the very spot where Picton broke the French centre in the battle of the 21st of June 1813, and were killed to a man. Henry then recrossed the Ebro to his first position at Navarete; the Black Prince crossed the same river at Logrono, and on the 3rd of April the two hosts stood face to face on the plain between Navarete and Najera. [Sidenote: April 3.]