General James Alexander St Clair-Erskine, 3rd Earl of Rosslyn PC, DL (15 February 1802 – 16 June 1866), styled Lord Loughborough from 1805 to 1837, was a Scottish soldier and Tory politician.
A General in the British Army, he also held political office as Master of the Buckhounds between 1841 and 1846 and again in 1852 and as Under-Secretary of State for War in 1859.
[7] Lord Rosslyn also commanded the Auxiliary Cavalry Regiment, The Fife Mounted Rifle Volunteers from 1860 until his death in 1866.
Rosslyn was returned to Parliament for Dysart Burghs, in Fife, in 1830,[8] a seat he held until 1831, and then represented Grimsby from 1831 to 1832.
In 1841 he was sworn of the Privy Council[10] and appointed Master of the Buckhounds under Sir Robert Peel,[11] which he remained until the government fell in 1846.