He was always polite, even to his two friends.

He invariably tried to be pleasant and agreeable and had a way of making people like him.
Otherwise, his character was not strongly marked.
Geary was quite different.

He never could forget himself.

He was incessantly talking about what he had done or was going to do.

In the morning he would inform Vandover of how many hours he had slept and of the dreams he had dreamed.