Boxtel, quite overcome by his frenzy, fell from the stone upon some Orangemen, who, like him, were sorely vexed at the turn which affairs had taken. They, mistaking the frantic cries of Mynheer Isaac for demonstrations of joy, began to belabour him with kicks and cuffs, such as could not have been administered in better style by any prize-fighter on the other side of the Channel.

Blows were, however, nothing to him. He wanted to run after the coach which was carrying away Cornelius with his bulbs. But in his hurry he overlooked a paving-stone in his way, stumbled, lost his centre of gravity, rolled over to a distance of some yards, and only rose again, bruised and begrimed, after the whole rabble of the Hague, with their muddy feet, had passed over him.

One would think that this was enough for one day, but Mynheer Boxtel did not seem to think so, as, in addition to having his clothes torn, his back bruised, and his hands scratched, he inflicted upon himself the further punishment of tearing out his hair by handfuls, as an offering to that goddess of envy who, as mythology teaches us, wears a head-dress of serpents.

It was indeed in itself a great honour for Cornelius van Baerle to to be confined in the same prison which had once received the learned master Grotius.

But on arriving at the prison he met with an honour even greater. As chance would have it, the cell formerly inhabited by the illustrious Barneveldt happened to be vacant, when the clemency of the Prince of Orange sent the tulip-fancier Van Baerle there.

The cell had a very bad character at the castle since the time when Grotius, by means of the device of his wife, made escape from it in that famous book-chest which the jailers forgot to examine.

On the other hand, it seemed to Van Baerle an auspicious omen that this very cell was assigned to him, for according to his ideas, a jailer ought never to have given to a second pigeon the cage from which the first had so easily flown.

The cell had an historical character. We will only state here that, with the exception of an alcove which was contrived there for the use of Madame Grotius, it differed in no respect from the other cells of the prison; only, perhaps, it was a little higher, and had a splendid view from the grated window.

Cornelius felt himself perfectly indifferent as to the place where he had to lead an existence which was little more than vegetation. There were only two things now for which he cared, and the possession of which was a happiness enjoyed only in imagination.

A flower, and a woman; both of them, as he conceived, lost to him for ever.

Fortunately the good doctor was mistaken. In his prison cell the most adventurous life which ever fell to the lot of any tulip-fancier was reserved for him.

One morning, whilst at his window inhaling the fresh air which came from the river, and casting a longing look to the windmills of his dear old city Dort, which were looming in the distance behind a forest of chimneys, he saw flocks of pigeons coming from that quarter to perch fluttering on the pointed gables of Loewestein.

My mind filled with admiration for this extraordinary man.

“You have solved it!” I cried.

“Hardly that, Watson. There are some points which are as dark as ever. But we have so much that it will be our own fault if we cannot get the rest. We will go straight to Whitehall Terrace and bring the matter to a head.”

When we arrived at the residence of the European Secretary it was for Lady Hilda Trelawney Hope that Sherlock Holmes inquired. We were shown into the morning-room.

“Mr. Holmes!” said the lady, and her face was pink with her indignation. “This is surely most unfair and ungenerous upon your part. I desired, as I have explained, to keep my visit to you a secret, lest my husband should think that I was intruding into his affairs. And yet you compromise me by coming here and so showing that there are business relations between us.”

“Unfortunately, madam, I had no possible alternative. I have been commissioned to recover this immensely important paper. I must therefore ask you, madam, to be kind enough to place it in my hands.”

The lady sprang to her feet, with the colour all dashed in an instant from her beautiful face. Her eyes glazed — she tottered — I thought that she would faint. Then with a grand effort she rallied from the shock, and a supreme astonishment and indignation chased every other expression from her features.

“You — you insult me, Mr. Holmes.”

“Come, come, madam, it is useless. Give up the letter.”

She darted to the bell.

“The butler shall show you out.”

“Do not ring, Lady Hilda. If you do, then all my earnest efforts to avoid a scandal will be frustrated. Give up the letter and all will be set right. If you will work with me I can arrange everything. If you work against me I must expose you.”

She stood grandly defiant, a queenly figure, her eyes fixed upon his as if she would read his very soul. Her hand was on the bell, but she had forborne to ring it.

“You are trying to frighten me. It is not a very manly thing, Mr. Holmes, to come here and browbeat a woman. You say that you know something. What is it that you know?”

“Pray sit down, madam. You will hurt yourself there if you fall. I will not speak until you sit down. Thank you.”

“I give you five minutes, Mr. Holmes.”

“One is enough, Lady Hilda. I know of your visit to Eduardo Lucas, of your giving him this document, of your ingenious return to the room last night, and of the manner in which you took the letter from the hiding-place under the carpet.”

She stared at him with an ashen face and gulped twice before she could speak.

“You are mad, Mr. Holmes — you are mad!” she cried, at last.

He drew a small piece of cardboard from his pocket. It was the face of a woman cut out of a portrait.

“I have carried this because I thought it might be useful,” said he. “The policeman has recognized it.”