At this period, after plundering, and a commission of other outrages at Dunboyn, the rebels, from the borders of Meath and Dublin, proceeded in the first instance to Dunshaughlin, and afterwards to the hill of Tara. Their numbers had rapidly increased; there were no military parties in the immediate neighbourhood; and unchecked and unresisted, they devastated the country for miles round their camp, to which they carried an immense quantity of booty. A few corps of yeomanry still remained in the vicinity, but they were not sufficiently numerous to attack a very strong and defensible position. Accident, however, interposed, and the royalists obtained the assistance they required.
Three companies of the Reay Fencibles, with a battalion gun, were on the march to the metropolis, and halted in Navan on the night of the 25th of May. Captain Preston, who commanded the yeomanry of that town, solicited the co-operation of Captain M’Clean to deforce the rebels....
‘After going some time in quest of the rebels they found them very strongly posted on Tara hill, where they had been four hours, and about four thousand in number, while the country people were flocking to them in great multitudes from every quarter. They had plundered the houses in all the adjacent country of provisions of every kind, and were proceeding to cook their dinners, having lighted nearly forty fires, and hoisted white flags in their camp.
‘The hill of Tara is very steep, and the upper part surrounded by three circular Danish forts, with ramparts and fosses; while on the top lies the churchyard surrounded with a wall, which the rebels regarded as their citadel, and considered impregnable.
‘The king’s troops, including the yeomanry, might have amounted to about four hundred. As soon as the rebels perceived them they put their hats on the tops of their spikes, sent forth some dreadful yells, and at the same time began to jump, and put themselves in singular attitudes, as if bidding defiance to their adversaries. They then began to advance, firing at the same time, but in an irregular manner.
‘Our line of infantry came on with the greatest coolness, and did not fire a shot until they were within fifty yards. One part of the cavalry, commanded by Lord Fingal, was ordered to the right, the other to the left, to prevent the line from being outflanked, which the enemy attempted to accomplish. The rebels made three desperate onsets, and in the last laid hold of the cannon; but the officer who commanded the gun laid the match to it before they could completely surround it, prostrated ten or twelve of the assailants, and dispersed the remainder. The Reay Fencibles preserved their line, and fired with as much coolness as if they had been exercising on a field-day.
‘At length they routed the rebels, who fled in all directions, having lost about four hundred in killed and wounded. In their flight they threw away arms and ammunition, and everything that could encumber them. Three hundred horses, all their provisions, arms, ammunition, and baggage fell into the hands of the victors, with eight of the Reay Fencibles, whom they had taken prisoners two days before, and whom they employed to drill them.
‘It is to be lamented that the Reay Fencibles lost twenty-six men in killed and wounded, and the Upper Kells infantry six men.
‘The king’s troops would have remained on the field all night, but they had not a cartridge left either for the gun or small arms, The prisoners, of whom they took a good many, informed our officers that their intention was to have proceeded that night to plunder Navan, and then Kells, where there was a great quantity of ammunition, and little or no force to protect it; and that when they had succeeded they expected, according to a preconcerted plan, to have been joined by a great number of insurgents from Meath, Westmeath, Lough, Monaghan, and Cavan.’
The defeat of the insurgents, and their complete dispersion at Tara hill and on the Curragh, were highly advantageous, as they opened the communications north and south with the metropolis, which had been seriously interrupted.