Final answer:
The provided excerpts do not contain any information about Poirot watching something at his table. They reference other literary works and a painting.
Step-by-step explanation:
The question references a character named Poirot, who is well-known as the detective in novels by Agatha Christie. However, the excerpts provided are from different classics of literature and do not directly mention Poirot nor what he is watching while sitting at his table. Instead, the references are from Edgar Allan Poe's 'The Murders in the Rue Morgue' (which features C. Auguste Dupin, not Poirot), Susan Glaspell's 'Trifles', and a comment on a still-life painting. No Poirot-related activities are described. The most relevant insight to 'watching' is from the excerpt about Dupin sitting in the dark as he believes reflection is better in such a setting, but this is not relevant to the original Poirot question.