Engraving depicting Mary Campbell (also known as Highland Mary 1763-1786) and Scottish poet Robert Burns (1759-1796) exchange Bibles over the Water of Fail in South Ayrshire, Scotland, 14th May 1786. Engraved by Richard Josey from a painting - 'The Betrothal of Robert Burns and Highland Mary' (1882) - by James Archer. (Photo by Hulton Archive/Getty Images)