It was further extended to its city centre terminus at Canal Street (later absorbed into Waverley Station) in 1847, by a 1000 yard tunnel which carried the line from Canal Street under Edinburgh's New Town with a gradient of 1 in 27.
It was further extended to its city centre terminus at Canal Street (which was later absorbed into Waverley Station) in 1847, at which time horse power was abandoned in favour of steam locomotives. The tunnel which carried the line from Canal Street under Edinburgh's New Town had a gradient of 1 in 27.