"Finish what you have to say," said William.

"I confess I knew the prisoner at the Hague."

"Happy prisoner!" said William, smiling.

At this moment the officer who had been sent for Boxtel returned, and announced to the Prince that the person whom he had been to fetch was following on his heels with his tulip.

Boxtel's return was scarcely announced, when he entered in person the drawing-room of Mynheer van Systens, followed by two men, who carried in a box their precious burden and deposited it on a table.

The Prince, on being informed, left the cabinet, passed into the drawing-room, admired the flower, and silently resumed his seat in the dark corner, where he had himself placed his chair.

Rosa, trembling, pale and terrified, expected to be invited in her turn to see the tulip.

She now heard the voice of Boxtel.

"It is he!" she exclaimed.

The Prince made her a sign to go and look through the open door into the drawing-room.

"It is my tulip," cried Rosa, "I recognise it. Oh, my poor Cornelius!"

And saying this she burst into tears.

The Prince rose from his seat, went to the door, where he stood for some time with the full light falling upon his his figure.

As Rosa's eyes now rested upon him, she felt more than ever convinced that this was not the first time she had seen the stranger.

"Master Boxtel," said the Prince, "come in here, if you please."

Boxtel eagerly approached, and, finding himself face to face with William of Orange, started back.

"His Highness!" he called out.

"His Highness!" Rosa repeated in dismay.

Hearing this exclamation on his left, Boxtel turned round, and perceived Rosa.

At this sight the whole frame of the thief shook as if under the influence of a galvanic shock.

"Ah!" muttered the Prince to himself, "he is confused."

But Boxtel, making a violent effort to control his feelings, was already himself again.

"Master Boxtel," said William, "you seem to have discovered the secret of growing the black tulip?"

"Yes, your Highness," answered Boxtel, in a voice which still betrayed some confusion.

It is true his agitation might have been attributable to the emotion which the man must have felt on suddenly recognising the Prince.

"But," continued the Stadtholder, "here is a young damsel who also pretends to have found it."

Boxtel, with a disdainful smile, shrugged his shoulders.

William watched all his movements with evident interest and curiosity.

"Then you don't know this young girl?" said the Prince.

"No, your Highness!"

"And you, child, do you know Master Boxtel?"

"No, I don't know Master Boxtel, but I know Master Jacob."

"What do you mean?"

"I mean to say that at Loewestein the man who here calls himself Isaac Boxtel went by the name of Master Jacob."

"What do you say to that, Master Boxtel?"

"I say that this damsel lies, your Highness."

"You deny, therefore, having ever been at Loewestein?"

Boxtel hesitated; the fixed and searching glance of the proud eye of the Prince prevented him from lying.

“Yes, it was by their light, and that of the lady’s bedroom candle, that the burglars saw their way about.”

“And what did they take?”

“Well, they did not take much — only half a dozen articles of plate off the sideboard. Lady Brackenstall thinks that they were themselves so disturbed by the death of Sir Eustace that they did not ransack the house, as they would otherwise have done.”

“No doubt that is true, and yet they drank some wine, I understand.”

“To steady their nerves.”

“Exactly. These three glasses upon the sideboard have been untouched, I suppose?”

“Yes, and the bottle stands as they left it.”

“Let us look at it. Halloa, halloa! What is this?”

The three glasses were grouped together, all of them tinged with wine, and one of them containing some dregs of beeswing. The bottle stood near them, two-thirds full, and beside it lay a long, deeply stained cork. Its appearance and the dust upon the bottle showed that it was no common vintage which the murderers had enjoyed.

A change had come over Holmes’s manner. He had lost his listless expression, and again I saw an alert light of interest in his keen, deep-set eyes. He raised the cork and examined it minutely.

“How did they draw it?” he asked.

Hopkins pointed to a half-opened drawer. In it lay some table linen and a large corkscrew.

“Did Lady Brackenstall say that screw was used?”

“No, you remember that she was senseless at the moment when the bottle was opened.”

“Quite so. As a matter of fact, that screw was not used. This bottle was opened by a pocket screw, probably contained in a knife, and not more than an inch and a half long. If you will examine the top of the cork, you will observe that the screw was driven in three times before the cork was extracted. It has never been transfixed. This long screw would have transfixed it and drawn it up with a single pull. When you catch this fellow, you will find that he has one of these multiplex knives in his possession.”

“Excellent!” said Hopkins.

“But these glasses do puzzle me, I confess. Lady Brackenstall actually saw the three men drinking, did she not?”

“Yes; she was clear about that.”

“Then there is an end of it. What more is to be said? And yet, you must admit, that the three glasses are very remarkable, Hopkins. What? You see nothing remarkable? Well, well, let it pass. Perhaps, when a man has special knowledge and special powers like my own, it rather encourages him to seek a complex explanation when a simpler one is at hand. Of course, it must be a mere chance about the glasses. Well, good-morning, Hopkins. I don’t see that I can be of any use to you, and you appear to have your case very clear. You will let me know when Randall is arrested, and any further developments which may occur. I trust that I shall soon have to congratulate you upon a successful conclusion. Come, Watson, I fancy that we may employ ourselves more profitably at home.”