The last speaker possessed a voice which was musical, and he articulated distinctly, though he scarcely ventured above a loud whisper. Mr. Barnes cautiously raised his head, arranging his pillows so that his ear would be near the partition. Fortunately, the two men next to him had taken the whole section, and the upper berth had been allowed to remain closed. Mr. Barnes now found that he could readily follow the conversation, which continued thus: "But see how that Barnes tracked this Pettingill day and night until he had trapped him. Just as the fellow supposed himself safe, he was arrested. You must admit that was clever work." "Oh, yes, clever enough in its way, but there was nothing specially artistic about it. Not that the detective was to blame; it was the fault of the criminal. There was no chance for the artistic." Yet Mr. Barnes had used that very adjective to himself in commenting upon his conduct of this case. The man continued: "The crime itself was inartistic. Pettingill bungled, Barnes was shrewd enough to detect the flaw, and with his experience and skill in such cases the end was inevitable." "It seems to me either that you have not read the full account of the case, or else you do not appreciate the work of the detective. Why, all the clue he had was a button." "Ah! Only a button--but such a button! That is where I say that the criminal was inartistic. He should not have lost that button." "It was an accident I suppose, and one against which he could not have guarded. It was one of the exigencies of his crime." "Exactly so; and it is these little accidents, always unforeseen, though always occurring, which hang so many, and jail so many, and give our detectives such an easy road to fame. That is the gist of the whole matter. It is an unequal game, this between the criminal and the detective." "I don't catch what you are driving at?" "I'll give you a dissertation on crime. Attend! In ordinary business it is brains _versus_ brains. The professional man contends with his fellows, and if he would win the race towards fortune he must show more brains. The commercial man competes with other tradesmen all as clever as himself. So it goes from the lawyer to the locksmith, from the preacher to the sign painter. It is brains rubbing against brains, and we get the most polished thought as the result. Thus the science of honest living progresses." "What has this to do with the criminal class?" "One moment. Let the philosopher teach you in his own way. With the criminal it is different. He is matched against his superior. Those in his own class do not contend with him; they are rather his partners, his 'pals,' as they term it. His only contention therefore is with the detective who represents society and the law. No man, I suppose, is a criminal from choice, and it is the criminal's necessity which leads to his detection." "Then all criminals should be caught."