The Question and Answer section for A Study in Scarlet is a great resource to ask questions, find answers, and discuss the novel.
Doyle builds suspense by piquing our interest...... providing information and contradictions that leave us, as readers, wanting answers. In Chapter Three, for instance, Gregson's letter promotes a sense of urgency.
Homer Barron, the foreman of a construction company.
The narrator certainly has sophisticated language as well as a flair for irony and subtle humor.