“Well, Mrs. Lucca,” said the prosaic Gregson, laying his hand upon the lady's sleeve with as little sentiment as if she were a Notting Hill hooligan, “I am not very clear yet who you are or what you are; but you've said enough to make it very clear that we shall want you at the Yard.”

“One moment, Gregson,” said Holmes. “I rather fancy that this lady may be as anxious to give us information as we can be to get it. You understand, madam, that your husband will be arrested and tried for the death of the man who lies before us? What you say may be used in evidence. But if you think that he has acted from motives which are not criminal, and which he would wish to have known, then you cannot serve him better than by telling us the whole story.”

“Now that Gorgiano is dead we fear nothing,” said the lady. “He was a devil and a monster, and there can be no judge in the world who would punish my husband for having killed him.”

“In that case,” said Holmes, “my suggestion is that we lock this door, leave things as we found them, go with this lady to her room, and form our opinion after we have heard what it is that she has to say to us.”