He pointed the cigar again. "And that’s the next point, the chance to use it. The two glasses of champagne that Grantham took were poured by the butler, Hackett; he did all the pouring. One of them had been sitting on the bar for four or five minutes, and Hackett poured the other one just before Grantham came. Who was there, at the bar, during those four or five minutes? We haven’t got that completely straight yet, but apparently everybody was, or nearly everybody. You were. By your statement, and Ethel Varr agrees, you and she went there and took two glasses of champagne of the five or six that were there waiting, and then moved off and stood talking, and soon after-you say three minutes-you saw Grantham bring the two glasses to Faith Usher. So you were there. So you might have dropped cyanide in one of the glasses? No. Even granting that you are capable of poisoning somebody’s champagne, you would certainly make sure that the right one got it. You wouldn’t just drop it in one of the glasses on the bar and walk away, and that applies to all the others, except Edwin Laidlaw, Helen Yarmis, and Mr and Mrs Robilotti. They hadn’t walked away. They were there at the bar when Grantham came and got the two glasses. But he took two glasses. If one of those four people saw him coming and dropped the cyanide in one of the glasses, you’ve got to assume that he or she didn’t give a damn whether Grantham got it or Faith Usher got it, which is too much for me. But not for you?" He clamped his teeth on the cigar. He never lit one.
"As you tell it," I conceded, "I wouldn’t buy it. But I have two comments. The first one is that there is one person who did know which glass Faith Usher would get. He handed it to her."
"Oh? You put it on Grantham?"
"I don’t put it on anybody. I merely say that you omitted a detail."
"Not an important one. If Grantham dropped the poison in at the bar before he picked up the glasses, there were five people right there, and that did take nerve. If he dropped it in while he was crossing to Faith Usher it was quite a trick, with a glass in each hand. If he dropped it in after he handed her the glass you would have seen him. What’s your second comment?"