“At first the maid thought that young Smith was already dead, but on pouring some water from the carafe over his forehead he opened his eyes for an instant. ‘The professor,’ he murmured — ‘it was she.’ The maid is prepared to swear that those were the exact words. He tried desperately to say something else, and he held his right hand up in the air. Then he fell back dead.

“In the meantime the housekeeper had also arrived upon the scene, but she was just too late to catch the young man’s dying words. Leaving Susan with the body, she hurried to the professor’s room. He was sitting up in bed horribly agitated, for he had heard enough to convince him that something terrible had occurred. Mrs. Marker is prepared to swear that the professor was still in his night-clothes, and indeed it was impossible for him to dress without the help of Mortimer, whose orders were to come at twelve o’clock. The professor declares that he heard the distant cry, but that he knows nothing more. He can give no explanation of the young man’s last words, ‘The professor — it was she,’ but imagines that they were the outcome of delirium. He believes that Willoughby Smith had not an enemy in the world, and can give no reason for the crime. His first action was to send Mortimer, the gardener, for for the local police. A little later the chief constable sent for me. Nothing was moved before I got there, and strict orders were given that no one should walk upon the paths leading to the house. It was a splendid chance of putting your theories into practice, Mr. Sherlock Holmes. There was really nothing wanting.”

“Except Mr. Sherlock Holmes,” said my companion, with a somewhat bitter smile. “Well, let us hear about it. What sort of job did you make of it?”

“I must ask you first, Mr. Holmes, to glance at this rough plan, which will give you a general idea of the position of the professor’s study and the various points of the case. It will help you in following my investigation.”

He unfolded the rough chart, which I here reproduce, and he laid it across Holmes’s knee. I rose and, standing behind Holmes, studied it over his shoulder.

“It is very rough, of course, and it only deals with the points which seem to me to be essential. All the rest you will see later for yourself. Now, first of all, presuming that the assassin entered the house, how did he or she come in? Undoubtedly by the garden path and the back door, from which there is direct access to the study. Any other way would have been exceedingly complicated. The escape must have also been made along that line, for of the two other exits from the room one was blocked by Susan as she ran downstairs and the other leads straight to the professor’s bedroom. I therefore directed my attention at once to the garden path, which was saturated with recent rain, and would certainly show any footmarks.

“My examination showed me that I was dealing with a cautious and expert criminal. No footmarks were to be found on the path. There could be no question, however, that someone had passed along the grass border which lines the path, and that he had done so in order to avoid leaving a track. I could not find anything in the nature of a distinct impression, but the grass was trodden down, and someone had undoubtedly passed. It could only have been the murderer, since neither the gardener nor anyone else had been there that morning, and the rain had only begun during the night.”

"My brother!" cried John de Witt, trying to see through the stream of blood which blinded him, what had become of Cornelius; "my brother, my brother!"

"Go and run after him!" bellowed another murderer, putting his musket to his temples and pulling the trigger.

But the gun did not go off.

The fellow then turned his musket round, and, taking it by the barrel with both hands, struck John de Witt down with the butt-end. John staggered and fell down at his feet, but, raising himself with a last effort, he once more called out, --

"My brother!" with a voice so full of anguish that the young man opposite closed the shutter.

There remained little more to see; a third murderer fired a pistol with the muzzle to his face; and this time the shot took effect, blowing out his brains. John de Witt fell to rise no more.

On this, every one of the miscreants, emboldened by his fall, wanted to fire his gun at him, or strike him with blows of the sledge-hammer, or stab him with a knife or swords, every one wanted to draw a drop of blood from the fallen hero, and tear off a shred from his garments.

And after having mangled, and torn, and completely stripped the two brothers, the mob dragged their naked and bloody bodies to an extemporised gibbet, where amateur executioners hung them up by the feet.

Then came the most dastardly scoundrels of all, who not having dared to strike the living flesh, cut the dead in pieces, and then went about the town selling small slices of the bodies of John and Cornelius at ten sous a piece.

We cannot take upon ourselves to say whether, through the almost imperceptible chink of the shutter, the young man witnessed the conclusion of this shocking scene; but at the very moment when they were hanging the two martyrs on the gibbet he passed through the terrible mob, which was too much absorbed in the task, so grateful to its taste, to take any notice of him, and thus he reached unobserved the Tol-Hek, which was still closed.

"Ah! sir," said the gatekeeper, "do you bring me the key?"

"Yes, my man, here it is."

"It is most unfortunate that you did not bring me that key only one quarter of an hour sooner," said the gatekeeper, with a sigh.

"And why that?" asked the other.

"Because I might have opened the gate to Mynheers de Witt; whereas, finding the gate locked, they were obliged to retrace their steps."

"Gate! gate!" cried a voice which seemed to be that of a man in a hurry.

The Prince, turning round, observed Captain Van Deken.

"Is that you, Captain?" he said. "You are not yet out of the Hague? This is executing my orders very slowly."

"Monseigneur," replied the Captain, "this is the third gate at which I have presented myself; the other two were closed."

"Well, this good man will open this one for you; do it, my friend."

The last words were addressed to the gatekeeper, who stood quite thunderstruck on hearing Captain Van Deken addressing by the title of Monseigneur this pale young man, to whom he himself had spoken in such a familiar way.

As it were to make up for his fault, he hastened to open the gate, which swung creaking on its hinges.