On the removal of Lieut.-General Conway to the fourth Irish horse, now seventh dragoon guards, in July, 1754, Colonel John Mostyn was appointed to the colonelcy of the Thirteenth Dragoons, from the Seventh Royal Fusiliers.
1757
1758
1759
1761
Colonel Mostyn was promoted to the rank of major-general, in 1757, and was removed in 1758, to the Fifth Royal Irish Dragoons,—when His Majesty conferred the colonelcy of the Thirteenth on Archibald Douglas, from the lieut.-colonelcy of the fourth dragoons. This officer was one of the King's aides-de-camp and a member of parliament, and he was promoted to the rank of major-general in 1759, and to that of lieut.-general in 1761.
1768
1770
In the clothing warrant of 1768, the facings of the regiment are directed to be of deep green, and the waistcoats and breeches of buff, instead of light-green. White waistcoats and breeches were adopted a few years afterwards, and a small red and white feather was introduced into the cocked-hats.
1778
Lieut.-General Douglas died at Dublin, in October, 1778, and was succeeded by Lieut.-General Richard Pierson, from the thirty-sixth foot. This officer was rewarded with the dignity of a Knight of the Bath.
1779
In 1779, the regiment proceeded by forced marches to the north of Ireland, in consequence of disturbances in that quarter, and its presence soon restored order.
1780