Charles, on his part, placed full confidence in his Irish officers. In his proclamation after the battle of Preston, he declared it was not his intention to enforce on the people of England, Scotland, or Ireland, "a religion they disliked." In a subsequent paper, he asks, "Have you found reason to love and cherish your governors as the fathers of the people of Great Britain and Ireland? Has a family upon whom a faction unlawfully bestowed the diadem of a rightful prince, retained a due sense of so great a trust and favour?" These and his other proclamations betrayed an Irish pen; probably Sir Thomas Sheridan's. One of Charles's English adherents, Lord Elcho, who kept a journal of the campaign, notes, complainingly, the Irish influence under which he acted. "The prince and his old governor, Sir Thomas Sheridan," are especially objected to, and the "Irish favourites" are censured in a body. While at Edinburgh, a French ship, containing some arms, supplies, and "Irish officers," arrived; at the same time efforts were made to recruit for the prince in Ireland; but the agents being taken in some cases, the channel narrowly watched, and the people not very eager to join the service, few recruits were obtained.
The Irish in France, as if to cover the inaction of their countrymen at home, strained every nerve. The Waterses and O'Brien of Paris were liberal bankers to the expedition. Into their hands James "exhausted his treasury" to support his gallant son. At Fontainebleau, on the 23rd of October, Colonel O'Brien, on the part of the prince, and the Marquis D'Argeusson for Louis XV., formed a treaty of "friendship and alliance," one of the clauses of which was, that certain Irish regiments, and other French troops, should be sent to sustain the expedition. Under Lord John Drummond a thousand men were shipped from Dunkirk, and arrived at Montrose in the Highlands about the time Charles had penetrated as far south as Manchester. The officers, with the prince, here refused to advance on London with so small a force; a retreat was decided on; the sturdy defence of Carlisle, and victory of Falkirk, checked the pursuit; but the overwhelming force of the Duke of Cumberland compelled them to evacuate Edinburgh, Perth, and Glasgow—operations which consumed February, March, and the first half of April, 1746.