It was rather because she instinctively felt that he was above his occupation.

To sum it up briefly, Breitmann was difficult to understand and Fitzgerald wasn't.
Fitzgerald had an idea; boldly put, it was a grave suspicion.

Not once had he forgotten the man in the chimney.

Once the finger had pointed at Breitmann or some one with whom he was in understanding.

This had proved to be groundless.