This delightful old photograph of the Edinburgh Gas Light Company is crammed with the workers who brought light to the night-time streets of Edinburgh:
In Indexing this photograph, Trove provide these details:
However, New Street [which is no longer] was never in Leith.
Here is the first edition OS map for Leith:
Here is the first edition OS map for Canongate, with Gas Works running alongside New Street:
My inclination is that the photograph of the workers of Edinburgh Gas Light Company was taken at the Canongate Works.
20 March 1817, 1817, Caledonian Mercury:
23 October 1817, Caledonian Mercury:
11 November 1846, The Scotsman:

