Thomas Annan was a Scottish photographer (*1829, +1887).
This photograph is part of a commission from the City of Glasgow Improvements Trust and is called "The Old Closes and Streets of Glasgow" and was created between 1868 and 1877.
The collection of images of the working class areas of old Glasgow helped document the impoverished living conditions of the working class at the time.
The vanishing point is the black wall break in the back.
Everything aligns in it and the viewer brings this "black hole" into focus.
At the first moment you are not oblivious to the fact that the alley is very narrow and high.