Page:The Benson Murder Case (1926).pdf/125

 yet, many persons would be benefited by almost anyone's death. Kill Sumner, and, on that theory, you could arrest the entire membership of the Authors' League."

"Opportunity, at any rate," persisted Markham, "is an insuperable factor in crime,—and by opportunity, I mean that affinity of circumstances and conditions which make a particular crime possible, feasible and convenient for a particular person."

"Another irrelevant factor," asserted Vance. "Think of the opportunities we have every day to murder people we dislike! Only the other night I had ten insuff'rable bores to dinner in my apartment—a social devoir. But I refrained—with consid'rable effort, I admit—from putting arsenic in the Pontet Canet. The Borgias and I, y' see, merely belong in different psychological categ'ries. On the other hand, had I been resolved to do murder, I would—like those resourceful cinquecento patricians—have created my own opportunity. . . . And there's the rub:—one can either make an opportunity or disguise the fact that he had it, with false alibis and various other tricks. You remember the case of the murderer who called the police to break into his victim's house before the latter had been killed, saying he suspected foul play, and who then preceded the policemen indoors and stabbed the man as they were trailing up the stairs."

"Well, what of actual proximity, or presence,