Wellesley, meanwhile, knowing himself to be close to the enemy, advanced steadily but with caution. He left behind his tents and other weighty baggage at Leiria, and moved forward with a lightly equipped army to Alcobaça on the fourteenth, to Caldas on the fifteenth. On that day the first shot of the campaign was fired: four companies of the fifth battalion of the 60th and of the second battalion of the 95th Rifles discovered the French outposts at Brilos in front of Obidos, drove them in, and pursuing furiously for three miles, came on the battalion which formed Delaborde’s rearguard. This corps turned upon them, checked them with the loss of two[203] officers and twenty-seven men killed and wounded, and only retired when General Spencer led up a brigade to save the riflemen. [203] The name of Lieutenant Bunbury, of the 2/95th, perhaps deserves remembrance as that of the first British officer killed in the Peninsular War. Next morning the French were discovered to have fallen back no further than Roliça, where Delaborde had found the position that he had sought in vain at Batalha. The road from Caldas and Obidos towards Torres Vedras and Lisbon passes for some miles over a sandy plain enclosed on either flank by bold hills. The southern limit of the basin is a cross-ridge, which connects the other two: in front of it lies Roliça, on the side-slope of an isolated eminence which overlooks the whole plain: a mile further south the road passes over the cross-ridge by a sort of gorge or defile, on the right hand of which is the village of Columbeira, while to its left rear lies that of Zambugeira. Though Delaborde had drawn up his men on the hill of Roliça down in the plain, it was not this advanced position that he intended to hold, but the higher and steeper line of the cross-ridge, on either side of the defile above Columbeira. Here he had a short front, only three-quarters of a mile in length, scarped by precipitous slopes, and covered by thickets and brushwood, which served to mask the strength (or rather the weakness) of his division.