fronts us now? If your reasoning is correct, the guilty person is some one with whom we've been talking this morning. It's an appalling thought. I've gone over in my mind every member of that household; and I simply can't regard any one of them as a potential mass-murderer."
"Sheer moral prejudice, old dear." Vance's voice assumed a note of raillery. "I'm a bit cynical myself, and the only person at the Greene mansion I'd eliminate as a possibility would be Frau Mannheim. She's not sufficiently imaginative to have planned this accumulative massacre. But as regards the others, I could picture any one of 'em as being at the bottom of this diabolical slaughter. It's a mistaken idea, don't y' know, to imagine that a murderer looks like a murderer. No murderer ever does. The only people who really look like murderers are quite harmless. Do you recall the mild and handsome features of the Reverend Richeson of Cambridge? Yet he gave his inamorata cyanide of potassium. The fact that Major Armstrong was a meek and gentlemanly looking chap did not deter him from feeding arsenic to his wife. Professor Webster of Harvard was not a criminal type; but the dismembered spirit of Doctor Parkman doubtless regards him as a brutal slayer. Doctor Lamson, with his philanthropic eyes and his benevolent beard, was highly regarded as a humanitarian; but he administered aconitine rather cold-bloodedly to his crippled brother-in-law. Then there was Doctor Neil Cream, who might easily have been mistaken for the deacon of a fashionable church; and the soft-spoken and amiable Doctor Waite. . . . And the women! Edith Thompson admitted putting powdered glass in her husband's
