Step 1: Understanding the Concept:
This question is about the character Horace Danby from the story "A Question of Trust." It specifically asks about his public reputation, i.e., what people thought of him.
Step 2: Detailed Explanation:
The story describes Horace Danby as a successful locksmith who was about fifty years old and unmarried. The text explicitly states that he was considered a "good and honest citizen." Although he had a secret life of robbing one safe per year, his public image was that of a respectable and honest man. The question asks what he was "thought" to be, not what he actually was.
Step 3: Final Answer:
Horace Danby was thought to be an honest citizen by those who knew him.