It can't be Swan Street, as that's on here and others from the 1890s:
>Map<The useful maps on there only go up to about 1895, so I can only assume they renamed one of the other streets on there at some point soon after. They'd certainly done it by 1900, as there's some reference to it in the Edinburgh Gazette in 1900. Others have certainly changed, as Townsend Street was Crawford Street, and Payne Street was Bank Street. Does the Harlaw St on yer map match any of them, VT?
All the world seems in tune on a Spring afternoon, when we're poisoning pigeons in the park.