The brave fellow was reluctant to remain inactive; but he had been, for some time, seriously unwell, having been laid up for a time with a severe attack of dysentery; and was really unfit for any continued exertion, although he had made light of his illness, and refused to go on the sick list. Terence pointed out to him that the command was a very important one. Here all the plunder that they might obtain from the enemy would be carried; and if, by means of spies or traitors, the French obtained news of the situation of the post, he might be attacked in great force before the other detachments could arrive to his assistance. As there were four thousand French troops at Zamora, it was agreed that no direct attack could be made upon the town. Bull with his force was to watch the garrison, attack any detachments that might be sent out--leaving them severely alone when they sallied out in force, and to content himself with outmarching their infantry, and beating off any cavalry attacks. He was, if necessary, to retreat in the direction of their stronghold. Macwitty was to occupy the road between Zamora and Valladolid, while the main body held the roads between both the latter town, and Zamora, to Salamanca. Frequent communication was to be kept up between them, so that either column might speedily be reinforced, if necessary. In the course of a week, the whole country was in a state of alarm. Bridges were broken down, roads blocked by deep cuttings across them, convoys attacked, small French posts at Tordesillas, Fuentelapena, and Valparaiso captured--the French soldiers being disarmed, and then taken under an escort to within ten miles of Salamanca. Toro was entered suddenly, and a garrison of three hundred men taken by surprise, and forced to lay down their arms. The powder, bullocks, and waggons with their stores were sent, by circuitous routes, to the bridge across the Douro at Miranda, and then up to their stronghold. So vigilant a watch was kept on the roads that no single courier was able to make his way from Valladolid to Salamanca or Zamora and, beyond the fact that the whole country seemed swarming with enemies, the French commanders were in absolute ignorance of the strength of the force that had so suddenly invaded Leon. One day a messenger rode in from Macwitty to Fuentelapena, where Terence had his headquarters; saying that a body of 4000 French infantry, with 1000 cavalry, were on the march from Valladolid towards Zamora. Strong positions had already been selected for the defence, and a bridge broken down at a point where the road crossed a tributary of the Douro.