Wolfe nodded. "There are subtleties, certainly. Naturally some of them escape you. All that we have actually proven is that of you four-Mrs. Barstow, her son and daughter, and yourself-none of you killed Carlo Maffei, and that the fatal driver was not in the golf bag on April ninth. It is still possible that any one of you, or all of you in conspiracy, killed Barstow. That theory would only require a colleague to dispose of Maffei."
Bradford, suddenly a little less mellow, stared. But the stare soon disappeared and he was easy again. "Rot. You don't believe that." Then he stared again. "But as a matter of fact, why don't you?"
"We'll come to that. First let me ask, do you think my frankness has earned a similar frankness from you?"
"I do."
"Then tell me, for example, when and how Mrs. Barstow previously made an attempt on her husband's life."
It was funny to watch Bradford. He was startled, then he went stiff and quiet, then he realized he was giving it away and tried to dress up his face in natural astonishment. After all that he said, "What do you mean? That's ridiculous!"
Wolfe wiggled a finger at him. "Easy, Doctor. I beg you, do not suspect me of low cunning. I am merely seeking facts to fit my conclusions. I see I had better first tell you why I have dismissed from my mind the possibility of your guilt or that of the Barstows. I cannot feel such a guilt. That is all. Of course I can rationalize my feeling, or lack of it. Consider the requirements: a wife or son or daughter who plans the murder of the father with great deliberation, shrewdness and patience. The lengthy and intricate preparation of the tool. If the wife or daughter, a fellow conspirator who killed Maffei. If the son, the same requirement, since he did not do it himself. Archie Goodwin went there, and he could not spend hours in such a household without smelling the foul odor that it would generate and without bringing the smell to me. You also would have required an accomplice for Maffei. I have spent an evening with you. Though you might murder, you would not murder like that, and you would trust no accomplice whatever. That is the rationalization; it is the feeling that is important."
"Then why-"