3º. The Monte Agraça. This lofty mountain overtopped the adjacent country in such a manner, that from its summit the whole of the first line could be distinctly observed. The right was separated from the Aruda position, by a deep ravine which led to nothing, the left overlooked the village and valley of Zibreira, and the centre overhung the town of Sobral. The summit of this mountain was crowned by an immense redoubt, mounting twenty-five guns, and having three smaller works, containing nineteen guns, clustered around. The garrisons, amounting to two thousand men, were supplied by Pack’s brigade, and on the reverse of the position, which might be about four miles in length, the fifth division, under general Leith, was posted in reserve. 4º. From the valley of Zibreira to Torres Vedras. This position, seven miles long, was at first without works, because it was only when the rains had set in, that the resolution to defend the first line permanently, was adopted. But the ground being rough and well defined, and the valley in front watered by the Zizandre, now become a considerable river, it presented a fine field of battle for a small army. The first and fourth, and a sixth division formed of troops just arrived from England and from Cadiz, were there posted, under the immediate command of lord Wellington himself; and his head-quarters were fixed at Pero Negro, near the Secorra, a rock, on which a telegraph was erected, communicating with every part of the Lines. 5º. From the heights of Torres Vedras to the mouth of the Zizandre. The right flank of this position and the pass in front of the town of Torres Vedras were secured, first, by one great redoubt, mounting forty guns, and, secondly, by several smaller forts, judiciously planted so as to command all the approaches. From these works to the sea a range of moderate heights were crowned with small forts; but the chief defence there, after the rains had set in, was to be found in the Zizandre, which was not only unfordable, but overflowed its banks, and formed an impassable marsh. A paved road, parallel to the foot of the hills, run along the whole front, that is, from Torres Vedras, by Runa Sobral and Aruda, to Alhandra. This was the nature of the _first_ line of defence; the _second_ was still more formidable. 1º. From the mouth of the St. Lourença to Mafra, a distance of seven miles, there was a range of hills naturally steep, artificially scarped, and covered by a deep, and in many parts impracticable ravine. The salient points were secured by forts, which flanked and commanded the few accessible points; but as this line was extensive, a secondary post was fortified a few miles in the rear, to secure a road leading from Ereceira to Cintra.