Mr. Guppy has been biting his thumb-nail during this dialogue, generally changing the thumb when he has changed the cross leg. As he is going to do so again, he happens to look at his coat-sleeve. It takes his attention. He stares at it, aghast.

"Why, Tony, what on earth is going on in this house to-night? Is there a chimney on fire?"

"Chimney on fire!"

"Ah!" returns Mr. Guppy. "See how the soot's falling. See here, on my arm! See again, on the table here! Confound the stuff, it won't blow off — smears like black fat!"

They look at one another, and Tony goes listening to the door, and a little way upstairs, and a little way downstairs. Comes back and says it's all right and