This rising street originated from the need for a dry-shod crossing of the muddy quagmire left behind when Nor' Loch, the body of water below the castle, was drained (the railway now cuts through this area). Work is said to have been started by a local tailor, George Boyd, who tired of struggling through the mud en route to his Old Town shop. The building of a ramp was under way by 1781, and by the time of its completion, in 1830, "Geordie Boyd's mud brig," as it was first
known, had been built up with an estimated 2 million cartloads of earth dug from the foundations of the New Town.
From Princes St. to George IV Bridge, Edinburgh, Scotland