Then rising with unruffled serenity, they took up their caps preparatory to departure.

Errington's gentle, refined voice broke the silence.
"You are in error, Mr.Gueldmar," he said in chilly but perfectly polite tones.

"I regret you should be so hasty in your judgment of us.

If you accepted us as 'men' when you first met us, I cannot imagine why you should now take us for spies.

The two terms are by no means synonymous.
I know nothing of Mr.Dyceworthy beyond that he called upon me, and that I, as in duty bound, returned his call.