“The absence of the latter means nothing, though its presence may mean everything,” said Holmes. “Unless the powder from a badly fitting cartridge happens to spurt backward, one may fire many shots without leaving a sign. I would suggest that Mr. Cubitt’s body may now be removed. I suppose, Doctor, you have not recovered the bullet which wounded the lady?”

“A serious operation will be necessary before that can be done. But there are still four cartridges in the revolver. Two have been fired and two wounds inflicted, so that each bullet can be accounted for.”

“So it would seem,” said Holmes. “Perhaps you can account also for the bullet which has so obviously struck the edge of the window?”

He had turned suddenly, and his long, thin finger was pointing to a hole which had been drilled right through the lower window-sash, about an inch above the bottom.

“By George!” cried the inspector. “How ever did you see that?”

“Because I looked for it.”

“Wonderful!” said the country doctor. “You are certainly right, sir. Then a third shot has been fired, and therefore a third person must have been present. But who could that have been, and how could he have got away?”

“That is the problem which we are now about to solve,” said Sherlock Holmes. “You remember, Inspector Martin, when the servants said said that on leaving their room they were at once conscious of a smell of powder, I remarked that the point was an extremely important one?”

“Yes, sir; but I confess I did not quite follow you.”

“It suggested that at the time of the firing, the window as well as the door of the room had been open. Otherwise the fumes of powder could not have been blown so rapidly through the house. A draught in the room was necessary for that. Both door and window were only open for a very short time, however.”

“How do you prove that?”

“Because the candle was not guttered.”

“Capital!” cried the inspector. “Capital!”

“Feeling sure that the window had been open at the time of the tragedy, I conceived that there might have been a third person in the affair, who stood outside this opening and fired through it. Any shot directed at this person might hit the sash. I looked, and there, sure enough, was the bullet mark!”

“But how came the window to be shut and fastened?”

“The woman’s first instinct would be to shut and fasten the window. But, halloa! what is this?”

It was a lady’s hand-bag which stood upon the study table — a trim little handbag of crocodile-skin and silver. Holmes opened it and turned the contents out. There were twenty fifty-pound notes of the Bank of England, held together by an india-rubber band — nothing else.

“This must be preserved, for it will figure in the trial,” said Holmes, as he handed the bag with its contents to the inspector. “It is now necessary that we should try to throw some light upon this third bullet, which has clearly, from the splintering of the wood, been fired from inside the room. I should like to see Mrs. King, the cook, again. You said, Mrs. King, that you were awakened by a loud explosion. When you said that, did you mean that it seemed to you to be louder than the second one?”

"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.