I went directly downstairs, and knocked at Mr. Dacre's door once more. He opened the door himself, his man not yet having returned.

'Ah, monsieur,' he cried, 'back already? You don't mean to tell me you have so soon got to the bottom of the silver spoon entanglement?'

'I think I have, Mr. Dacre. You were sitting at dinner opposite Mr Vincent Innis. You saw him conceal a silver spoon in his pocket. You probably waited for some time to understand what he meant by this, and as he did not return the spoon to its place, you proposed a conjuring trick, made the bet with him, and thus the spoon was returned to the table.'

'Excellent! excellent, monsieur! that is very nearly what occurred, except that I acted at once. I had had experiences with Mr. Vincent Innis before. Never did he enter these rooms of mine without my missing some little trinket after he was gone. Although Mr. Innis is a very rich person, I am not a man of many possessions, so if anything is taken, I meet little difficulty in coming to a knowledge of my loss. Of course, I never mentioned these abstractions to him. They were all trivial, as I have said, and so far as the silver spoon was concerned, it was of no great value either. But I thought the bet and the recovery of the spoon would teach him a lesson; it apparently has not done so. On the night of the twenty-third he sat at my right hand, as you will see by consulting your diagram of the table and the guests. I asked him a question twice, to which he did not reply, and looking at him I was startled by the expression in his eyes. They were fixed on a distant corner of the room, and following his gaze I saw what he was staring at with such hypnotising concentration. So absorbed was he in contemplation of the packet there so plainly exposed, now my attention was turned to it, that he seemed to be entirely oblivious of what was going on around him. I roused him from his trance by jocularly calling Gibbes's attention to the display of money. I expected in this way to save Innis from committing the act which he seemingly did commit. Imagine then the dilemma in which I was placed when Gibbes confided to me the morning after what had occurred the night before. I was positive Innis had taken the money, yet I possessed no proof of it. I could not tell Gibbes, and I dare not speak to Innis. Of course, monsieur, you do not need to be told that Innis is not a thief in the ordinary sense of the word. He has no need to steal, and yet apparently cannot help doing so. I am sure that no attempt has been made to pass those notes. They are doubtless resting securely in his house at Kensington. He is, in fact, a kleptomaniac, or a maniac of some sort. And now, monsieur, was my hint regarding the silver spoons of any value to you?'

'Of the most infinite value, Mr. Dacre.'

'Then let me make another suggestion. I leave it entirely to your bravery; a bravery which, I confess, I do not myself possess. Will you take a hansom, drive to Mr. Innis's house on the Cromwell Road, confront him quietly, and ask for the return of the packet? I am anxious to know what will happen. If he hands it to you, as I expect he will, then you must tell Mr. Gibbes the whole story.'

'Mr. Dacre, your suggestion shall be immediately acted upon, and I thank you for your compliment to my courage.'

I found that Mr. Innis inhabited a very grand house. After a time he entered the study on the ground floor, to which I had been conducted. He held my card in his hand, and was looking at it with some surprise.

'I think I have not the pleasure of knowing you, Monsieur Valmont,' he said, courteously enough.

'No. I ventured to call on a matter of business. I was once investigator for the French Government, and now am doing private detective work here in London.'