The space of time before the siege-train for Badajoz could be got ready was employed by Beresford in clearing southern Estremadura of the enemy. Having left a brigade of the 2nd Division at Talavera Real, a battalion of the Lusitanian Legion (from Cole’s division) in Olivenza, and some squadrons of Portuguese cavalry round the southern front of Badajoz, to watch the garrison, the army marched for Santa Marta and Zafra, on the high-road to Seville, with its own cavalry in front, and Penne Villemur’s Spanish squadrons on the left (April 16th-18th). The bulk of the infantry went no further forward, because Latour-Maubourg withdrew into the Sierra Morena on the rumour of its approach. The cavalry continued the pursuit--at Los Santos on the 16th its leading regiment, the 13th Light Dragoons, had a smart affair with the French rearguard (2nd Hussars), and routed it with the loss of three officers and many men[347]. After this Latour-Maubourg never stopped till he had reached Guadalcanal, on the borders of Andalusia, evacuating Llerena and the other towns on the Estremaduran slope of the mountains (April 19th). Beresford thereupon left his British cavalry at Zafra, and Penne Villemur at Llerena, to watch the passes, while he drew back his infantry divisions to take in hand the siege of Badajoz (April 20th), with the exception of the brigade of Colborne, which was sent out with some Spanish horse to demonstrate against Latour-Maubourg, and to drive him still further southward if he showed signs of irresolution. [347] Long says that the 13th took about 150 prisoners (_Vindication_, p. 104), but the French accounts do not acknowledge anything like such loss.