The doctor looked sharply at him, and then shook his head.
"Nonsense," he said, cheerfully, "it is a common delusion with people that they have heart disease, and in nine cases out of ten it's all imagination; unless, indeed," he added, waggishly, "the patient happens to be a young man."
"Ah! I suppose you think I'm safe as far as that goes," said Frettlby, as they entered the study, "and what did you think of Rolleston's argument about people being mad?"
"It was amusing," replied Chinston, taking a seat, Frettlby doing the same. "That's all I can say about it, though, mind you, I think there are more mad people at large than the world is aware of."
"Indeed!"
"Yes; do you remember that horrible story of Dickens' in the 'Pickwick Papers,' about the man who was mad and knew it, yet successfully concealed it for years? Well, I believe there are many people like that in the world, people whose lives are one long struggle against insanity, and yet who eat, drink, talk and walk with the rest of their fellowmen, evidently as gay and light hearted as they are."
"How extraordinary."
"Half the murders and suicides are done in temporary fits of insanity," went on Chinston, "and if a person broods over anything his incipient madness is sure to break out sooner or later; but of course there are cases where a perfectly sane person may commit a murder on the impulse of the moment, but I regard such persons as mad for the time being; but again, a murder may be planned and executed in the most cold-blooded manner."
"And in the latter case," said Frettlby, without looking at the doctor, and playing with the paper knife, "do you regard the murderer as mad?"
"Yes, I do," answered the doctor, bluntly. "He is as mad as a person who kills another because he supposes he has been told by God to do so, only there is method in his madness. For instance, I believe that hansom cab murder in which you were mixed up"
"Dn it, sir! I wasn't mixed up in it," interrupted Frettlby, pale with anger.
"Beg pardon," said Chinston, coolly, "a slip of the tongue; I was thinking of Fitzgerald. Well, I believe
