What is the purpose of the 'stream of consciousness' within The Mark on the Wall - what effect/concepts does it bring up?
I was reading the story and I didn't know the purpose of the trains of thought, and why it was there, and how it connected with the snail :s
The strain of thoughts is the central idea of the story. Her manic thoughts over this "spot" bring the reader from the past to the present over a short period of time. Seemingly one hour but through the thoughts years. The story is showing the manic thoughts that take place in a persons head over little things like a spot on the wall. The snail is an arbitrary point the author is trying to make. The spot while important to the theme of the story, is a minimal thing compared to the thoughts that invade ones mind.
Hope this helps!