No other door, windows always shut yet clean, a smoking chimney—what kind of life can hide behind a house that seems not to belong?

“A very good rule, too,” said the lawyer.

“But I have studied the place for myself,” continued Mr. Enfield. “It seems scarcely a house. There is no other door, and nobody goes in or out of that one but, once in a great while, the gentleman of my adventure. There are three windows looking on the court on the first floor; none below; the windows are always shut but they’re clean. And then there is a chimney which is generally smoking; so somebody must live there. And yet it’s not so sure; for the buildings are so packed together about the court, that it’s hard to say where one ends and another begins.”