"What is troubling you now, with a sense of ignorance?"
"I see in a great many carriages two gentlemen dressed just alike, sitting together; they are on the back seat always, and they always have their arms folded, just alike; what are they?"
"Not gentlemen, Rotha; they are footmen, or grooms."
"What's the difference?"
"Between footmen and grooms?"
"No, no; between a gentleman and a man that isn't a gentleman?"
"You asked me that once before, didn't you?"
"Yes; but I don't make it out."
"Why do you try?"
"Why Mr. Digby, I like to understand things."