From Pamplona the prince marched by Arruiz to Salvatierra, which opened its gates to his army, and thence advanced to Vitoria, intending to march on Burgos by this direct route. A body of his knights, which he had sent out to reconnoitre under Sir William Felton, was defeated by a skirmishing party, and he found that Henry had occupied some strong positions, and especially Santo Domingo de la Calzada on the right of the river Ebro, and Zaldiaran mountain on the left, which made it impossible for him to reach Burgos through Álava. Accordingly he crossed the Ebro, and encamped under the walls of Logroño. During these movements the prince's army had suffered from want of provisions both for men and horses, and from wet and windy weather. At Logroño, however, though provisions were still scarce, they were somewhat better off.