The find, as part of a dig on the tram route between York Place and Newhaven, is believed to be the oldest part of the famous thoroughfare, with the cobble-lined causeway between 600-900 years old.
Whatever else they uncover, it will be added to the fascinating history of one of Edinburgh’s longest and oldest streets.
1. Laying original tram lines
Construction workers lay down the original tram lines on Leith Walk in 1904.
Photo: Edinburgh City Libraries
2. Return of the tram work
With tram excavations ongoing again, residents will feel a sense of deja vu - the entire street suffered huge upheaval between 2007 and 2014 as work was carried out to clear the way for the original trams project, before the line to Leith was scrapped.
Photo: Ian Georgeson
3. Greenways bus lane
In a bid to ease traffic congestion on Leith Walk it became one of five areas in the city to get a Greenways bus lane in 1997 - designated for buses and taxis during peak times of the day.
Photo: Tina Norris
4. Guns and Ammo
Always a place for more unusual shops, Leith Walk was home to Guns & Ammo, which sold air guns and hunting goods including knives, from the 1970s into the 1990s.
Photo: Ian Brand