[3] In 1795, he served as assistant secretary and aide de camp to the Duke of York, then commander-in-chief of the British Army.

[3] In the following year he returned to the Duke of York's service and remained there until 1805, although he was transferred to the 9th West India Regiment as a lieutenant-colonel in 1801.

[3] However, in the following year, with a period of relative calm in the midst of the Napoleonic Wars, he was placed on half pay.

He was first and principal aide de camp to King George IV in 1827, and also deputy Secretary at War.

[3] On the death of the king in 1837 he retired, although he was first and principal aide de camp to Queen Victoria 1837–39.