Sam McDonald , called "Big Sam", was a Scotsman of unusual height for his day who had a distinguished military career and was a noted "strongman". Most sources state his height as 6 feet 10 inches, with a burly build, although one 1822 source claims 7 feet 4 inches. Born in Lairg, Sutherland in 1762, he served in the 2nd Sutherland Fencibles 1779-83 and the Royal Scots 1783-1789 . From 1791-93 he was employed by the Prince of Wales, and during this time appeared at the Drury Lane Theatre, playing Hercules in "Cymon and Iphigenia". From 1793-99 he was in the 3rd Sutherland Fencibles, and from 1799 until his death in 1802 in the newly formed 93rd Sutherland. Wikipedia*
On the C-SPAN Networks:
Sam McDonald has one video in the C-SPAN Video Library; the first appearance was a 2011 Call-In.