When Lynch left, it was already past nine in the evening. Originally, Mr. Wardrick should have demonstrated the noble quality of being considerate of guests as a host and tried to invite Lynch to stay overnight at his house.
After all, it's getting late, and leaving at this time isn't very fitting for social etiquette.
In the past, when transportation was inconvenient and society wasn't as stable as it is now, traveling at night was extremely dangerous, whether by carriage, driving yourself, or walking. It was very risky, so once it got dark, hosts would invite guests to spend the night at their place to avoid danger.
Though today's society doesn't have these dangers, such etiquette remains as a symbolic inquiry, and guests may not necessarily want to stay at the host's house.
But Mr. Wardrick did not extend a polite invitation. He finds Lynch a bit unpredictable now; what if Lynch truly decided to stay?
