postcard is "No 81" in the "Castle Series, Edinburgh".
The style of numbering matches earlier photos by James
Patrick, so this may be a continuation of the same series.
I think it unlikely that it was taken by James Patrick.
Judging by the cars the photo appears to have been taken
around the 1930s or 1940s. James Patrick was born in
1867. I don't know the date of his death.