to fourteenth-century Chronicle of Mann, the twelfth- to thirteenth-century Chronicle of Melrose, the thirteenth-century Gesta Annalia I, the fifteenth-century Mac Carthaigh's Book, and the fifteenth-century Scotichronicon. The Chronicle of Melrose reports that Somairle's forces were drawn "from Ireland and various places". Irish sources—such as the Annals of Tigernach, Annals of Ulster, and Mac Carthaigh's Book—specify that his forces consisted of men from Argyll, Kintyre, the Isles, and Dublin. Such depictions of Somairle's forces appear to reflect the remarkable reach of power that he possessed at his peak. The invasion was clearly a well-planned affair. According to the Chronicle of Mann, Somairle's invasion fleet numbered one hundred and sixty ships. If each ship carried forty to fifty combatants, Somairle may have led between six thousand and eight thousand men. Although the tallies of combatants given by mediaeval sources are generally suspect, they can be indicative of the magnitude of a force's size. The participation of Dubliners in Somairle's venture suggests that he had an alliance with the Dubliners. Specifically, he may have had a pact with either the overlord of Dublin, Diarmait Mac Murchada, King of Leinster, or else with Diarmait's own overlord, Muirchertach Mac Lochlainn, High King of Ireland. According to the Chronicle of Mann, and the Chronicle of Melrose, Somairle's fleet made landfall at Renfrew. It is possible that the fleet specifically landed at Inchinnan, where his forces could have first engaged the Scots. The battle was evidently a fiasco for the Islesmen, with their commanding-king killed in a skirmish against local levies. The account given by Carmen de Morte Sumerledi certainly suggests that Somairle was killed in the outset—"wounded by spear, slain by the sword"—and overcome by a hastily organised body of local defenders. As such, Somairle could have fallen in the opening encounter, with his leaderless followers giving up the fight. The account given by Carmen de Morte Sumerledi further states that Somairle's head was cut off by a priest, and presented to Herbert, Bishop of Glasgow. According to Gesta Annalia I, Somairle was killed with a son named Gilla Coluim. It is possible that this source has mistaken the latter's name for Gilla Brigte, the name that the Annals of Tigernach accords to Somairle's slain son. It is unknown if Dubgall participated in the battle. The stated location of Renfrew could be evidence that the target of Somairle's strike was Walter fitz Alan, Steward of Scotland.