I felt Holmes’s hand steal into mine and give me a reassuring shake, as if to say that the situation was within his powers, and that he was easy in his mind. I was not sure whether he had seen what was only too obvious from my position, that the door of the safe was imperfectly closed, and that Milverton might at any moment observe it. In my own mind I had determined that if I were sure, from the rigidity of his gaze, that it had caught his eye, I would at once spring out, throw my great coat over his head, pinion him, and leave the rest to Holmes. But Milverton never looked up. He was languidly interested by the papers in his hand, and page after page was turned as he followed the argument of the lawyer. At least, I thought, when he has finished the document and the cigar he will go to his room, but before he had reached the end of either, there came a remarkable development which turned our thoughts into quite another channel.

Several times I had observed that Milverton looked at his watch, and once he had risen and sat down again, with a gesture of impatience. The idea, however, that he might have an appointment at so strange an hour never occurred to me until a faint faint sound reached my ears from the veranda outside. Milverton dropped his papers and sat rigid in his chair. The sound was repeated, and then there came a gentle tap at the door. Milverton rose and opened it.

“Well,” said he, curtly, “you are nearly half an hour late.”

So this was the explanation of the unlocked door and of the nocturnal vigil of Milverton. There was the gentle rustle of a woman’s dress. I had closed the slit between the curtains as Milverton’s face had turned in our direction, but now I ventured very carefully to open it once more. He had resumed his seat, the cigar still projecting at an insolent angle from the corner of his mouth. In front of him, in the full glare of the electric light, there stood a tall, slim, dark woman, a veil over her face, a mantle drawn round her chin. Her breath came quick and fast, and every inch of the lithe figure was quivering with strong emotion.

“Well,” said Milverton, “you made me lose a good night’s rest, my dear. I hope you’ll prove worth it. You couldn’t come any other time — eh?”

The woman shook her head.

“Well, if you couldn’t you couldn’t. If the Countess is a hard mistress, you have your chance to get level with her now. Bless the girl, what are you shivering about? That’s right. Pull yourself together. Now, let us get down to business.” He took a notebook from the drawer of his desk. “You say that you have five letters which compromise the Countess d’Albert. You want to sell them. I want to buy them. So far so good. It only remains to fix a price. I should want to inspect the letters, of course. If they are really good specimens — Great heavens, is it you?”

The woman, without a word, had raised her veil and dropped the mantle from her chin. It was a dark, handsome, clear-cut face which confronted Milverton — a face with a curved nose, strong, dark eyebrows shading hard, glittering eyes, and a straight, thin-lipped mouth set in a dangerous smile.

Our interest is in a smiling, sparkling face to be seen amid the members of the Horticultural Committee; in the person with a flower in his belt, combed and brushed, and all clad in scarlet, -- a colour which makes his black hair and yellow skin stand out in violent contrast.

This hero, radiant with rapturous joy, who had the distinguished honour of making the people forget the speech of Van Systens, and even the presence of the Stadtholder, was Isaac Boxtel, who saw, carried on his right before him, the black tulip, his pretended daughter; and on his left, in a large purse, the hundred thousand guilders in glittering gold pieces, towards which he was constantly squinting, fearful of losing sight of them for one moment.

Now and then Boxtel quickened his step to rub elbows for a moment with Van Systens. He borrowed a little importance from everybody to make a kind of false importance for himself, as he had stolen Rosa's tulip to effect his own glory, and thereby make his fortune.

Another quarter of an hour and the Prince will arrive and the procession will halt for the last time; after the tulip is placed on its throne, the Prince, yielding precedence to this rival for the popular adoration, will take a magnificently emblazoned parchment, on which is written the name of the grower; and his Highness, in a loud and audible tone, will proclaim him to be the discoverer of a wonder; that Holland, by the instrumentality of him, Boxtel, has forced Nature to produce a black flower, which shall henceforth be called Tulipa nigra Boxtellea.

From time to time, however, Boxtel withdrew his eyes for a moment from the tulip and the purse, timidly looking among the crowd, for more than anything he dreaded to descry there the pale face of the pretty Frisian girl.

She would have been a spectre spoiling the joy of the festival for him, just as Banquo's ghost did that of Macbeth.

And yet, if the truth must be told, this wretch, who had stolen what was the boast of man, and the dowry of a woman, did not consider himself as a thief. He had so intently watched this tulip, followed it so eagerly from the drawer in Cornelius's dry-room to the scaffold of the Buytenhof, and from the scaffold to the fortress of Loewestein; he had seen it bud and grow in Rosa's window, and so often warmed the air round it with his breath, that he felt as if no one had a better right to call himself its producer than he had; and any one who would now take the black tulip from him would have appeared to him as a thief.

Yet he did not perceive Rosa; his joy therefore was not spoiled.

In the centre of a circle of magnificent trees, which were decorated with garlands and inscriptions, the procession halted, amidst the sounds of lively music, and the young damsels of Haarlem made their appearance to escort the tulip to the raised seat which it was to occupy on the platform, by the side of the gilded chair of his Highness the Stadtholder.

And the proud tulip, raised on its pedestal, soon overlooked the assembled crowd of people, who clapped their hands, and made the old town of Haarlem re-echo with their tremendous cheers.