“I don’t-know-”

“I will tell you what you did. You stood and looked into the room. You seemed distressed, and you said, ‘No, no-he doesn’t like it!’ Then you went to the small table near the middle of the room. That is the table upon which Miss Vane placed the coffee-tray on Wednesday night.”

Minnie Mercer said, “Yes-” The sound just carried and no more.

“You put out your hand towards the table. You stood there for a moment. Then you turned a little to the right and went over to Mr. Latter’s chair. The table beside it is the one upon which his coffee-cup was placed on Wednesday night. You put out your hand again. You put out your hand as if you were holding something-you put it out as if you were setting something down. Miss Mercer-on Wednesday night did you take a cup of coffee from the tray and carry it over to the table beside Mr. Latter’s chair?”

Minnie looked at her with dilated eyes. She made the sound that she had made before. They thought the sound was “Yes-”

“When you took that cup from the tray, were there two cups there, or only one?”

Minnie said, “One-”

“When you went over to the table by Mr. Latter’s chair, was there a cup there already?”

“Yes-”

“What did you do?”

“I changed the cups.”

“You put down the one you had brought from the tray and took up the other?”

“Yes-I changed the cups.”

“Will you tell us why you did this?”

A long sigh lifted her breast.

“Yes-I’ll tell you. Oh, I didn’t want Jimmy to know-but it can’t be helped-”

Lamb said, “Miss Mercer, it is my duty to warn you that what you say will be taken down and may be used in evidence against you.”

She gave him a fleeting glance and shook her head.

“It’s not like that. I’ll tell you how it was.”

Frank Abbott took up his pad and began to write.

She spoke quite calmly, almost with an air of relief, her voice exhausted but quite audible now.

“When I made my statement I didn’t say anything that wasn’t true. I didn’t say everything, because I didn’t want Jimmy to know. When I came to the door on Wednesday night Mrs. Latter was standing by the tray just as I said in my statement. I thought she was putting sugar into one of the cups-I really did think so. She was tipping it in out of a little ornamental snuffbox she has. I never thought about its not being sugar, or glucose-one of those things. I just thought it was some new kind of fancy sweetening stuff. She was like that, you know-always trying new things. And sometimes she would go in for slimming-I thought perhaps it was something to do with that. She put all the stuff into the cup and stirred it up. Then she put two lumps of sugar in and stirred them up too. And she took up the little bottle of cognac and put in quite a lot. I thought it was her own cup, but she took it over and put it down by Jimmy’s chair. I thought how he would hate it.” She paused, closed her eyes for a moment, and then went on again. “He doesn’t like things very sweet-he doesn’t take more than one lump in tea or coffee. I thought Mrs. Latter ought to have known that-I thought she must have known it. Everyone knew how much he disliked her Turkish coffee, and that he only drank it because she said she thought someone was trying to poison her. Everybody knew that. I am afraid I thought that she was putting all that sugar in out of spite-to make it as nasty as possible for him. I couldn’t bear it, and I changed the cups.”

Lamb said in his solid voice,

“Did you see her put anything into the second cup?”

“No.”

He leaned forward, a hand on either knee.

“You say she tipped this powder into the cup from a little ornamental snuffbox. Can you describe it?”

“Oh, yes. It was French-eighteenth century, I believe- about two inches long and not quite so wide-silver-gilt, with a picture of Venus and Cupid on the lid, painted on porcelain.”

He said, “H’m! What did she do with it?”

“With the box?”

“Yes. Did you see what she did with it?”

There was a feeling of expectancy. Frank Abbott held his pencil poised. Miss Silver ceased to knit. Minnie Mercer said,

“Yes, I saw where she put it. She had the coffee-cup in her right hand and the box in her left. When she had put the cup down she took up some of the dried rose-leaves from the bowl on the table and filled the box. Then she opened the table drawer and slipped the box inside.”

“What did you think of her doing that?”

She said without hesitation, “I didn’t think about it at all- not at the time-of course afterwards-”

He said, “I’m coming to that. Miss Mercer-just when did you realize what you had done?”

“As soon as I knew that Mrs. Latter was dead.”

“Not before that?”

“Oh, no-how could I?”

“You might have noticed that she was ill-drowsy- sleepy.”

She shook her head.

“No-there was no opportunity. I was-very tired. As soon as they had finished their coffee I took out the tray and washed the cups. I didn’t go back to the drawing-room again. I went up to bed.”

“Yes, of course-it was you who washed the cups. Nothing strike you when you were doing it-sediment at the bottom of a cup?”

She said, “No. You see, it was Turkish coffee-there are always the grounds-you wouldn’t see any sediment.”

“You didn’t notice anything unusual?”

“No.”

“And you went up to bed. Did you go to sleep?”

“Yes-I was very tired.”

“What waked you?”

“The disturbance in the house after Julia had come in and found Mrs. Latter.”

“You were downstairs when the doctor came?”

“Yes.”

“And later on when Inspector Smerdon arrived?”

“Yes.”

“And by this time you had realized that Mrs. Latter had drunk the coffee which she intended for her husband?”

She looked for a moment as if she were going to faint. Then she said in an extinguished voice,

“I was-beginning-to realize it-”

He fixed a reproving look upon her.

“Then why didn’t you speak up and say what you had done? You say your statement wasn’t an untruthful one, but when you suppress a lot of critical evidence, it comes as near being untruthful as makes no difference. Why didn’t you speak up and save us all a lot of trouble?”

A wavering colour came into Minnie Mercer’s face. She sat up straight.

“You can’t take things back when you’ve said them. I had to think-but the more I thought, the less I knew what I ought to do. I had to think what was going to be the best thing for Jimmy.”

Miss Silver coughed.

“The truth is always best. Falsehood really helps no one.”

Minnie took no notice.

“I had to think about Jimmy. I thought it would kill him if he knew that his wife had tried to poison him-I was afraid of what he might do. And then I was afraid of what he might do if he thought she had committed suicide-he would have believed that it was his fault. And then I began to be afraid that you were suspecting him. There didn’t seem to be any way out, and I didn’t know what to do.”

Frank Abbott wrote that down. Lamb turned round to him.

“Get along to the drawing-room and see if that box is where she says it ought to be!”