[Sidenote: Wimphen’s Memoir.] The Catalan army was now divided, part being kept on the Llobregat, under general Caro, part under general Yranzo at Momblanch, and part, under Campo Verde, on the hills watching Frere’s covering division. O’Donnel had before directed two convoys upon Tortoza, but the rapidity with which the investment had been effected prevented them from entering the place; and while he was endeavouring to arrange with Bassecour and Campo Verde a general plan of succour, his wounds forced him to embark for Valencia, when the command, of right, belonged to Yranzo, but the people, as I have before said, insisted upon having Campo Verde. [Illustration: _Vol. 4 Plate 1._ _Explanatory Sketch_ OF THE SIEGE OF TORTOZA, 1811. _London. Published by T. & W. BOONE._] SIEGE OF TORTOZA. The half bastion of San Pedro, which was situated in the plain, and close to the river, was the first object of the French attack, and to prevent the fire of Fort Orleans from incommoding the trenches, the line of approach was traced in a slanting direction, refusing the right, and pushing forward the left; and to protect its flanks on the one side, Fort Orleans was masked by a false attack, while, on the other side of the Ebro, trenches were opened against the bridge-head, and brought down close to the water. The 19th the posts of the besieged were all driven in, and an unfinished Spanish work, commenced on the heights in advance of Fort Orleans, was taken possession of. In the night, a flying sap was commenced upon an extent of three hundred and sixty yards, and at a distance of only one hundred and sixty from the fort; but in the following night, the true attack was undertaken in the plain, during a storm of wind which, together with the negligence of the Spaniards, who had placed no guards in front of their covered way, enabled the besiegers to begin this work at only one hundred and fifty yards from the half bastion of San Pedro. This parallel was above five hundred yards long, extending from the false attack against Fort Orleans, down to the bank of the river; two communications were also begun, and on the left bank ground was broken against the bridge-head. The 21st, at day-break, the Spaniards, perceiving the works, commenced a heavy fire, and soon after made a sally; but they were overwhelmed by musketry from the false attack of Fort Orleans, and from the trenches on the right bank of the Ebro. In the night of the 21st, the communication in the plain was extended to fourteen hundred yards, nine batteries were commenced, and bags of earth were placed along the edge of the trenches, whence chosen men shot down the Spanish artillery-men. On the 23rd, a night sally, made from the bridge-head, was repulsed; and on the 24th, the second parallel of the true attack was commenced.