Here is a cracking picture taken during WW2 when the South Harbour was also used as a submarine base.
The sub's are moored off the West Quay / Fish Quay. In the background can be seen the Transit Shed. Further on, on the North Quay can be seen the bucket dredger Cowpen. On the right, moored against the Middle Jetty can be seen the sub's support vessel or Depot Ship No. 6, 'Titania'.
I had thought initially that this looked like a picture from WW1, however various facts (build dates etc.) about 'Titania' and submarine H28 prove that the picture can only have been taken at the time of WW2. Judging by the shadows, the lady has gone for an evening stroll. I am surprised that she would have been allowed to walk in such a sensitive place given the nature of the military hardware she is looking at, perhaps it is even more amazing that the person she was walking with took the photograph! Unless it was something to do with home war news. It certainly wouldn't be allowed these days. You can just make out the sub crews working away on the fore decks.
P