“Well, yes, sir. A gentleman asked her. I happened to be near. And I did notice that a lady was by when she drank it. They each had a glass of wine.”
“Do you know the lady and gentleman?”
“I know them well by sight, sir, but not their names. They have been to supper before; once or twice, I think, but they don’t often come.”
“Do they come together?”
“I think so, sir.”
“And you could describe their appearance to me?”
“Certainly, sir.”
“Thank you, John. Of course you will say nothing of all this to anybody. You won’t forget that?”
“You can rely upon my absolute discretion, sir.”
“Good. I shall be back at Cavendish Square within an hour, and I will see you then.”