You ought to know his father.

He is a regular old Don Quixote." "The Don was not particularly practical.

He would not have done much with coal and iron lands," observed the banker.

"What do you know about this man's knowledge of such things ?" Norman admitted that on this point he had no information.
"He says he knows Wickersham--your friend," said Mr.Creamer, with a sly look at Norman.
"Yes, I expect he does--if any one knows him.

He used to know him.