The 1st of July the governor of Gueteria abandoned that place, and with detestable ferocity secretly left a lighted train which exploded the magazine and destroyed many of the inhabitants. His troops three hundred in number entered San Sebastian, and at the same time a vessel from St. Jean de Luz arrived with fifty-six cannoneers and some workmen; the garrison was thus increased to three thousand men and all persons not able to provide subsistence for themselves in advance were ordered to quit the place. Meanwhile Mendizabal, having cut off the aqueduct, made some approaches towards the head of the burned bridge on the right of the Urumea and molested the workmen on the heights of Bartolomeo. On the 3d, the Surveillante frigate and a sloop with some small craft arrived to blockade the harbour, yet the French vessels from St. Jean de Luz continued to enter by night. The same day the governor made a sally with eleven hundred men in three columns to obtain news, and after some hours’ skirmishing returned with a few prisoners. The 6th some French vessels with a detachment of troops and a considerable convoy of provisions came from St. Jean de Luz. The 7th Mendizabal tried, unsuccessfully, to set fire to the convent of San Bartolomeo. On the 9th sir Thomas Graham arrived with a corps of British and Portuguese troops, and on the 13th the Spaniards marched, some to reinforce the force blockading Santona, the remainder to rejoin the fourth army on the Bidassoa. At this time general Reille held the entrances to the Bastan by Vera and Echallar, but Wellington drove him thence on the 15th and established the seventh and light divisions there, thus covering the passes over the Peña de Haya by which the siege might have been interrupted. Before general Graham arrived the French had constructed a redoubt on the heights of San Bartolomeo, and connected it with the convent of that name which they also fortified. These outworks were supported by posts in the ruined houses of the suburb of San Martin behind, and by a low circular redoubt, formed of casks on the main road, half-way between the convent and the horn-work. Hence to reduce the place, working along the isthmus, it was necessary to carry in succession three lines of defence covering the town, and a fourth at the foot of Monte Orgullo, before the castle of La Mota could be assailed. Seventy-six pieces of artillery were mounted upon these works and others were afterwards obtained from France by sea. [Sidenote: Jones’s Journal of British Sieges.]