The origin of this distinguished corps is uncertain, the regimental papers having been destroyed by fire in 1841; but it was raised about 1639, and was originally called by the same name it now bears, which, however, had been for a long time in disuse, and was only in 1877 restored to the corps by the late Queen Victoria. Previously it had been styled "The Scots Fusilier Guards" and the "3rd Foot Guards." Throughout its long career it has ever been distinguished for its valour and discipline. At Namur it advanced without firing a shot, but exposed to the murderous fire of the enemy from the ramparts, close up to the palisades, when they poured in their volleys and put the enemy to confusion. It distinguished itself at Lincelles for its coolness, steady fire and gallant bayonet charge. During the Peninsular War it was constantly engaged, and there and at subsequent battles not only upheld the traditions of the regiment, but gained a reputation no troops could surpass.

Nicknamed "The Jocks."