Terence received orders to co-operate with 10,000 of the Portuguese militia, under the command of Trant. Wilson and Miller were to harass Massena's right flank and rear. Had Wellington's orders been carried out, Massena would have found the country deserted by its inhabitants and entirely destitute of provisions; but as usual his orders had been thwarted by the Portuguese government, who sent secret instructions to the local authorities to take no steps to carry them out; and the result was that Massena, as he advanced, found ample stores for provisioning his army. The speed with which Wellington fell back baffled his calculations and, by the time he approached Viseu, the whole British army was united, near Coimbra. His march had been delayed two days, by an attack made by Trant and Terence upon the advanced guard, as it was making its way through a defile. A hundred prisoners were taken, with some baggage; and a serious blow would have been struck at the French, had not the new Portuguese levies been seized with panic and fled in confusion. Trant was, consequently, obliged to draw off. The attack, however, had been so resolute and well-directed that Massena, not knowing the strength of the force opposing him, halted for two days until the whole army came up; and thus afforded time for the British to concentrate, and make their arrangements. [Illustration: Plan of the Battle of Busaco.] The ground chosen by Wellington to oppose Massena's advance was on the edge of the Sierra Busaco; which was separated, by a deep and narrow valley, from the series of hills across which the French were marching. There were four roads by which the French could advance. The one from Mortagao, which was narrow and little used, passed through Royalva. The other three led to the position occupied by the British force between the village of Busaco and Pena Cova. Trant's command was posted at Royalva. Terence with his regiment took post, with a Portuguese brigade of cavalry, on the heights above Santa Marcella, where the road leading south to Espinel forked; a branch leading from it across the Mondego, in the rear of the British position, to Coimbra. Here he could be aided, if necessary, by the guns at Pena Cova, on the opposite side of the river. While the British were taking up their ground between Busaco and Pena Cova, Ney and Regnier arrived on the crest of the opposite hill. Had they attacked at once, as Ney wished, they might have succeeded; for the divisions of Spenser, Leith, and Hill had not yet arrived. But Massena was ten miles in the rear, and did not come up until next day, with Junot's corps; by which time the whole of the British army was ranged along the opposite heights.