Mrs. Snagsby screws a watchful glance on Jo as he is brought into the little drawing-room by Guster. He looks at Mr. Snagsby the moment he comes in. Aha! Why does he look at Mr. Snagsby? Mr. Snagsby looks at him. Why should he do that, but that Mrs. Snagsby sees it all? Why else should that look pass between them, why else should Mr. Snagsby be confused and cough a signal cough behind his hand? It is as clear as crystal that Mr. Snagsby is that boy’s father.