The theme might also be about man's relationship with nature. The sloe black river represents nature in this story. Fishing in it shows how humans interact with it. It could be about how we try to take from nature (like catching fish), but also how nature affects us, perhaps with its mystery and power. For example, the strange color of the river might make the characters feel small and insignificant in the face of nature.
The title 'fishing the sloe black river' gives a sense of a very specific activity in a rather unique location. The 'sloe' color of the river might imply that it's not a typical, clear river. It could be polluted or just have a very dark, foreboding look. In the story, the act of fishing could be a metaphor for something else, like searching for meaning in life. If the characters are fishing, what are they hoping to catch? It could be more than just fish, perhaps answers or a sense of purpose.
One possible main theme could be nature. Since the river is a part of nature, the story might focus on how humans interact with it, whether it's for survival, exploration, or just enjoying its beauty.
One possible main theme could be mystery. Since the black cloth is mentioned, it might be something that is not fully understood at first and the story could be about uncovering its significance.
The main theme could be relaxation. In the 'the lazy river short story', the lazy river itself might symbolize a place of peace and calm, away from the hustle and bustle of daily life.
One possible theme could be mystery. Since it's about a black phone, there might be a lot of unknown elements related to it.
Since I have no knowledge of 'the black chat short story', I can't be certain about its main theme. It could be a story that uses 'black' to represent a negative emotion or situation, and the chats in the story could be centered around that. For example, if it's about a group of people in a difficult situation sharing their thoughts through chats, and the 'black' could be a metaphor for their hardships.
The main theme could be the struggle between reality and illusion. The black monk might represent something that blurs the line between what's real and what's not in the protagonist's mind.
The main theme is often related to the power of the imagination and its impact on a person's perception of reality. The protagonist's hallucinations of the black monk show how his mind can create something that blurs the line between the real and the imagined.
The main theme could be about mystery. In many short stories set in a 'black city', mystery often prevails as the setting itself is rather gloomy and can hide many secrets.
The main theme could be about the mystery of the black dog. Maybe it represents something unknown or a symbol of fear.