Having taken the oath before Sidney in Dublin, Perrott went to Cork, where he found himself at the head of about 700 men, 200 of which were Irish. From Cork he went to Kilmallock, where he lodged in a half-burned house, and issued a proclamation to the townsmen to return and repair their walls and buildings, which in course of time they did. He then pursued the rebels, whom he came up with at Knocklong. The Irish fled into the bogs, whither Perrott's soldiers followed them barefooted, carrying light cavalry lances instead of pikes. They returned with a trophy of fifty heads, with which the Lord President decorated the market-cross at Kilmallock for the edification of those citizens of Limerick who had complained of losing their goods. Lord Roche's cattle were restored to him, and Perrott, having made Kilmallock defensible, marched towards Limerick. A castle belonging to the Burkes of Clanwilliam blocked his way, but part of the wall fell after three hours' mining, and the chief's wife then surrendered. Thomond, O'Shaughnessy, and Sir Thomas of Desmond came to him at Limerick, and he then went to Cashel. His march was again impeded by a castle, which he took 'by shooting of fire up into the top, which was covered with thatch.' The blaze and the noise of the falling roof frightened his picketed horses--he had about 200 mounted men--who broke loose and ran off into the woods, where they were caught by the rebels, and in some cases not recovered. At Cashel he hanged seven Gray merchants for supplying the enemy with provisions, the chief magistrate of the town hardly escaping the same fate. From Cashel he went by Fethard and Clonmel to Ormonde's house at Carrick, and thence by Lismore to Cork, taking the strong castle of Mocollop on the way. At Cork the President was attended by Clancare and Thomond, who had now made up their minds as to which was the strongest side, by Lords Barry, Roche, and Courcy, and by MacCarthy Reagh and Sir Cormac MacTeige. The White Knight's country was again invaded, his castles taken, and himself driven into the woods. The Glen of Aherlow was then entered without much result, and after a few days' rest at Cork Perrott marched against the MacSwineys. The style of warfare may be gathered from his biographer's words. 'He slew many of the rebels, and hanged as many as he might take, whom the Marshal executed always as he went along; so that they took a great prey, spoiled all the enemy's country, and with continual travel wore out all their provisions, having no corn in the country left to make their bread, which the President himself wanted for divers days, their chief sustenance being the milk of those kine that they had taken.' [Sidenote: Perrott's personal behaviour.]