Thus, after a week's ineffectual siege, Douglas left Athlone, and made all haste to rejoin the army of William, which had already reduced the most important towns in the south of Ireland. On the 7th of August he rejoined William at Cahirconlish, a few miles west of Limerick. The flower of the Irish army was assembled at Limerick. The Duke of Berwick and General Sarsfield occupied the city with their forces. The French general, Boileau, commanded the garrison. The besieged were almost as numerous as the besiegers. William, by garrisoning the towns of which he took possession, had reduced his forces to about twenty thousand men. Limerick was fortified by walls, batteries, and ramparts. It was also defended by a castle and citadel. It had always been a place of great strength. The chivalry of the Anglo-Norman monarch, the Ironsides of Cromwell, had been defeated under its walls; and now the victorious army of William III. was destined to meet with a similar repulse. Limerick is situated in an extensive plain, watered by the noble Shannon. The river surrounds the town on three sides. Like Athlone, the city is divided into the English and Irish towns, connected together by a bridge. The English town was much the strongest. It was built upon an island, surrounded by morasses, which could at any time be flooded on the approach of an enemy. The town was well supplied with provisions--all Clare and Galway being open to it, from whence it could draw supplies. Notwithstanding the strength of the fortress, William resolved to besiege it. He was ill supplied with cannon, having left his heavy artillery at Dublin. He had only a field train with him, which was quite insufficient for his purpose. William's advance-guards drove the Irish outposts before them; the pioneers cutting down the hedges and filling up the ditches, until they came to a narrow pass between two bogs, where a considerable body of Irish horse and foot were assembled to dispute the pass. Two field-pieces were brought up, which played with such effect upon the Irish horse that they soon quitted their post. At the same time Colonel Earle, at the head of the English foot, attacked the Irish who were firing through the hedges, so that they also retired after two hours' fighting. The Irish were driven to the town walls, and William's forces took possession of two important positions, Cromwell's fort and the old Chapel. The Danes also occupied an old Danish fort, built by their ancestors, of which they were not a little proud.