I was, of course, familiar with the pictures of the famous statesman, but the man himself was very different from his representation. He was a tall and stately person, scrupulously dressed, with a drawn, thin face, and a nose which was grotesquely curved and long. His complexion was of a dead pallor, which was more startling by contrast with a long, dwindling beard of vivid red, which flowed down over his white waistcoat, with his watch-chain gleaming through its fringe. Such was the stately presence who looked stonily at us from the centre of Dr. Huxtable’s hearthrug. Beside him stood a very young man, whom I understood to be Wilder, the private secretary. He was small, nervous, alert, with intelligent light-blue eyes and mobile features. It was he who at once, in an incisive and positive tone, opened the conversation.

“I called this morning, Dr. Huxtable, too late to prevent you from starting for London. I learned that your object was to invite Mr. Sherlock Holmes to undertake the conduct of this case. His Grace is surprised, Dr. Huxtable, that you should have taken such a step without consulting him.”

“When I learned that the police had failed —”

“His Grace is by no means convinced that the police have failed.”

“But surely, Mr. Wilder —”

“You are well well aware, Dr. Huxtable, that his Grace is particularly anxious to avoid all public scandal. He prefers to take as few people as possible into his confidence.”

“The matter can be easily remedied,” said the browbeaten doctor; “Mr. Sherlock Holmes can return to London by the morning train.”

“Hardly that, Doctor, hardly that,” said Holmes, in his blandest voice. “This northern air is invigorating and pleasant, so I propose to spend a few days upon your moors, and to occupy my mind as best I may. Whether I have the shelter of your roof or of the village inn is, of course, for you to decide.”

I could see that the unfortunate doctor was in the last stage of indecision, from which he was rescued by the deep, sonorous voice of the red-bearded Duke, which boomed out like a dinner-gong.

“I agree with Mr. Wilder, Dr. Huxtable, that you would have done wisely to consult me. But since Mr. Holmes has already been taken into your confidence, it would indeed be absurd that we should not avail ourselves of his services. Far from going to the inn, Mr. Holmes, I should be pleased if you would come and stay with me at Holdernesse Hall.”

“I thank your Grace. For the purposes of my investigation, I think that it would be wiser for me to remain at the scene of the mystery.”

“Just as you like, Mr. Holmes. Any information which Mr. Wilder or I can give you is, of course, at your disposal.”

“It will probably be necessary for me to see you at the Hall,” said Holmes. “I would only ask you now, sir, whether you have formed any explanation in your own mind as to the mysterious disappearance of your son?”

Rosa watched the flower-pot with an interest which betrayed to Boxtel the real value of the object enclosed in it.

This object could not be anything else but the second bulb, that is to say, the quintessence of all the hopes of the prisoner.

When the nights threatened to be too cold, Rosa took in the flower-pot.

Well, it was then quite evident she was following the instructions of Cornelius, who was afraid of the bulb being killed by frost.

When the sun became too hot, Rosa likewise took in the pot from eleven in the morning until two in the afternoon.

Another proof: Cornelius was afraid lest the soil should become too dry.

But when the first leaves peeped out of the earth Boxtel was fully convinced; and his telescope left him no longer in any uncertainty before they had grown one inch in height.

Cornelius possessed two bulbs, and the second was intrusted to the love and care of Rosa.

For it may well be imagined that the tender secret of the two lovers had not escaped the prying curiosity of Boxtel.

The question, therefore, was how to wrest the second bulb from the care of Rosa.

Certainly this was no easy task.

Rosa watched over her tulip as a mother over her child, or a dove over her eggs.

Rosa never left her room during the day, and, more than that, strange to say, she never left it in the evening.

For seven days Boxtel in vain watched Rosa; she was always at her post.

This happened during those seven days which made Cornelius so unhappy, depriving him at the same time of all news of Rosa and of his tulip.

Would the coolness between Rosa and Cornelius last for ever?

This would have made the theft much more difficult than Mynheer Isaac had at first expected.

We say the theft, for Isaac had simply made up his mind to steal the tulip; and as it grew in the most profound secrecy, and as, moreover, his word, being that of a renowned tulip-grower, would any day be taken against that of an unknown girl without any knowledge of horticulture, or against that of a prisoner convicted of high treason, he confidently hoped that, having once got possession of the bulb, he would be certain to obtain the prize; and then the tulip, instead of being called Tulipa nigra Barlaensis, would go down to posterity under the name of Tulipa nigra Boxtellensis or Boxtellea.

Mynheer Isaac had not yet quite decided which of these two names he would give to the tulip, but, as both meant the same thing, this was, after all, not the important point.

The point was to steal the tulip. But in order that Boxtel might steal the tulip, it was necessary that Rosa should leave her room.

Great therefore was his joy when he saw the usual evening meetings of the lovers resumed.

He first of all took advantage of Rosa's absence to make himself fully acquainted with all the peculiarities of the door of her chamber. The lock was a double one and in good order, but Rosa always took the key with her.

Boxtel at first entertained an idea of stealing the key, but it soon occurred to him, not only that it would be exceedingly difficult to abstract it from her pocket, but also that, when she perceived her loss, she would not leave her room until the lock was changed, and then Boxtel's first theft would be useless.