This officer was appointed in 1755, sub-lieutenant in the second, or Scots, troop of horse grenadier guards, of which the celebrated General Eliott, afterwards Lord Heathfield, Baron Gibraltar, was lieut.-colonel; and when Colonel Eliott raised his famed regiment of “Light Horse,” now the fifteenth, or King’s Hussars, lieutenant Ainslie was appointed captain of the first troop in that regiment. He proceeded with the fifteenth light dragoons to Germany, in 1760, and distinguished himself in the memorable action at Emsdorf, where his regiment acquired great honour. He was also present at numerous other actions, where “Eliott’s Light Horse” availed themselves of every opportunity to acquire additional laurels; and on the 29th of March, 1762, he was promoted to the majority of the regiment. At the engagement near Homburg, on the 1st of July, 1762, he highly distinguished himself, and was commended in the public despatch of Prince Ferdinand of Brunswick. In the action near Friedberg, on the 30th of August following, he was attacked by three French hussars, and received a dangerous wound in the head. He was promoted to the lieut.-colonelcy of the fifteenth light dragoons in 1770, to the rank of colonel in the army in 1779, and to that of major-general in 1782: in 1789 King George III. rewarded him with the colonelcy of the THIRTEENTH foot, His Majesty having frequently witnessed, and expressed his high approbation of, the condition of the fifteenth light dragoons under colonel Ainslie’s command. He was afterwards appointed lieut.-governor of Scilly Island, was promoted to the rank of lieut.-general in 1796, and to that of general in 1801. He died in 1804. ALEXANDER CAMPBELL. _Appointed 11th July, 1804._