as well as those of Conor MacDermott. The Irish then carefully prepared an ambush site in the Curlew Mountains, along the English line of march. O'Donnell had trees felled and placed along the road to impede their progress. When he got word of the English passing through Boyle, O'Donnell positioned his men. Musketeers, archers, and javelin men were placed in the woods alongside the road to harass the English soldiers. The main body of Irish infantry, armed with pikes and axes, were placed out of sight behind the ridge of the mountain. The battle In hot harvest weather, Clifford's force marched from Athlone through Roscommon, Tulsk, and Boyle. At 4pm on 15 August, they reached the foot of the Curlew Mountains (highest point 860 feet), which had to be crossed before Sligo could be approached. The expedition was poorly supplied, and Clifford's men were tired and hungry, and probably in no fit state to continue. But Clifford had received false intelligence that the pass was undefended, and he therefore chose to seize the opportunity and march across, promising his troops plenty of beef in the evening. This meant that his men missed out on the rest that had been planned for them in Boyle, whereas the Irish were well-fed and prepared. The English came under gunfire, arrow and javelin attack as soon as they reached the first of O'Donnell's barricades, between Boyle and Ballinafad. The barricade was lightly defended by just a handful of Irish troops who quickly abandoned it and rode on horseback to their army's camp to inform Red Hugh O'Donnell of the advancing English forces. Immediately following the news of the advancing English force, Conor MacDermott and his 600 troops moved swiftly into the mountains and took up concealed positions on either side of the bog road near the Bohar-Buidhe Woods. The English moved past and proceeded up the hill where they sustained further casualties as O'Donnell's skirmishers engaged in hit-and-run attacks on the English formation. The road consisted of "stones of six or seven foot broad, lying above ground, with plashes of bog between them", and was lined with woodland on one side. The further the English advanced, the more intensive the rebels' fire became, and some English soldiers began to lose their nerve and slip away. Eventually, there was a firefight, lasting about 90 minutes. Initially the English forces advanced and despite heavy return fire,