He was introduced to Cardinal Henry Benedict Stuart at Rome, attended one of Frederick the Great's reviews in Silesia, and resided in France and at Vienna.
[6] The Royal Longford Militia played little part in suppressing the main rebellion, but in August a French force under General Humbert belatedly landed in Ireland.
Granard and the remnants of the Royal Longford Militia reached Tuam the following morning All the army's baggage and cannons in Castlebar fell into the hands of the enemy.
Although the authorities were highly critical of the performance of the Irish Militia, the Commander-in-Chief, Lord Cornwallis, wrote in highest praise of Granard's gallantry in endeavouring to rally his regiment.
[3][7][8][9] Granard displayed the greatest aversion to the union, an opinion from which none of the inducements then so lavishly offered by the government made him swerve, and he was one of the twenty-one Irish peers who recorded their protest against the measure.
[3] During the brief administration of 'All the Talents' in 1806 he was made a peer of the United Kingdom under the title of Baron Granard of Castle Donington, Leicestershire (the seat of his father-in-law), and was also appointed clerk of the crown and hanaper in Ireland, then a most lucrative office.
He came to England to support both the Roman Catholic Emancipation and Reform Bills, and after the passing of the latter was offered a promotion in the peerage, which he declined, as he had previously refused the order of St. Patrick.
By this lady, who was sister of the first Marquis of Hastings, Granard had nine children, including: He died at his residence, the Hôtel Marbœuf, Champs-Elysées, Paris, on 9 June 1837, at the age of seventy-seven, and was buried in the family resting-place at Newtownforbes, County Longford, Ireland.