"You say that you returned to your room. Did you leave it again before next morning?"

"Yes, when the alarm came that the poor creature had met her death I ran out with the others "

"Did you see Mr. Gibson?"

"Yes, he had just returned from the bridge when I saw him. He had sent for the doctor and the police."

"Did he seem to you much perturbed?"

"Mr. Gibson is a very strong, self-contained man. I do not think that he would ever show his emotions on the surface. But I, who knew him so well, could see that he was deeply concerned."

"Then we come to the all-important point. This pistol that was found in your room. Had you ever seen it before?"

"Never, I swear it."

"When was it found?"

"Next morning, when the police made their search."

"Among your clothes?"

"Yes, on the floor of my wardrobe under my dresses."

"You could not guess how long it had been there?"

"It had not been there the morning before."

"How do you know?"

"Because I tidied out the wardrobe."

"That is final. Then someone came into your room and placed the pistol there in order to inculpate you."

"It must have been so."

"And when?"

"It could only have been at mealtime, or else at the hours when I would be in the schoolroom with the children."

"As you were when you got the note?"

"Yes, from that time onward for the whole morning."

"Thank you, Miss Dunbar. Is there any other point which could help me in the investigation?"

"I can think of none."

"There was some sign of violence on the stonework of the bridge – a perfectly fresh chip just opposite the body. Could you suggest any possible explanation of that?"

"Surely it must be a mere coincidence."

"Curious, Miss Dunbar, very curious. Why should it appear at the very time of the tragedy, and why at the very place?"

"But what could have caused it? Only great violence could have such an effect."

Holmes did not answer. His pale, eager face had suddenly assumed that tense, faraway expression which I had learned to associate with the supreme manifestations of his genius. So evident was the crisis in his mind that none of us dared to speak, and we sat, barrister, prisoner, and myself, watching him in a concentrated and absorbed silence. Suddenly he sprang from his chair, vibrating with nervous energy and the pressing need for action.

"Come, Watson, come!" he cried.

"What is it, Mr. Holmes?"

"Never mind, my dear lady. You will hear from me, Mr. Cummings. With the help of the god of justice I will give you a case which will make England ring. You will get news by tomorrow, Miss Dunbar, and meanwhile take my assurance that the clouds are lifting and that I have every hope that the light of truth is breaking through."

It was not a long journey from Winchester to Thor Place, but it was long to me in my impatience, while for Holmes it was evident that it seemed endless; for, in his nervous restlessness he could not sit still, but paced the carriage or drummed with his long, sensitive fingers upon the cushions beside him. Suddenly, however, as we neared our destination he seated himself opposite to me – we had a first-class carriage to ourselves – and laying a hand upon each of my knees he looked into my eyes with the peculiarly mischievous gaze which was characteristic of his more imp-like moods.

"Watson," said he, "I have some recollection that you go armed upon these excursions of ours."

It was as well for him that I did so, for he took little care for his own safety when his mind was once absorbed by a problem so that more than once my revolver had been a good friend in need. I reminded him of the fact.

"Yes, yes, I am a little absent-minded in such matters. But have you your revolver on you?"

I produced it from my hip-pocket, a short, handy, but very serviceable little weapon. He undid the catch, shook out the cartridges, and examined it with care.

"It's heavy – remarkably heavy," said he.

"Yes, it is a solid bit of work."

He mused over it for a minute.

"Do you know, Watson," said he, "I believe your revolver is going to have a very intimate connection with the mystery which we are investigating."

"My dear Holmes, you are joking."

"No, Watson, I am very serious. There is a test before us. If the test comes off, all will be clear. And the test will depend upon the conduct of this little weapon. One cartridge out. Now we will replace the other five and put on the safety-catch. So! That increases the weight and makes it a better reproduction."

I had no glimmer of what was in his mind, nor did he enlighten me, but sat lost in thought until we pulled up in the little Hampshire station. We secured a ramshackle trap, and in a quarter of an hour were at the house of our confidential friend, the sergeant.

"A clue, Mr. Holmes? What is it?"

"It all depends upon the behavior of Dr. Watson's revolver," said my friend. "Here it is. Now, officer, can you give me ten yards of string?"

The village shop provided a ball of stout twine.

"I think that this is all we will need," said Holmes. "Now, if you please, we will get off on what I hope is the last stage of our journey."

The sun was setting and turning the rolling Hampshire moor into a wonderful autumnal panorama. The sergeant, with many critical and incredulous glances, which showed his deep doubts of the sanity of my companion, lurched along beside us. As we approached the scene of the crime I could see that my friend under all his habitual coolness was in truth deeply agitated.

"Yes," he said in answer to my remark, "you have seen me miss my mark before, Watson. I have an instinct for such things, and yet it has sometimes played me false. It seemed a certainty when first it flashed across my mind in the cell at Winchester, but one drawback of an active mind is that one can always conceive alternative explanations which would make our scent a false one. And yet – and yet – Well, Watson, we can but try."

As he walked he had firmly tied one end of the string to the handle of the revolver. We had now reached the scene of the tragedy. With great care he marked out under the guidance of the policeman the exact spot where the body had been stretched. He then hunted among the heather and the ferns until he found a considerable stone. This he secured to the other end of his line of string, and he hung it over the parapet of the bridge so that it swung clear above the water. He then stood on the fatal spot, some distance from the edge of the bridge, with my revolver in his hand, the string being taut between the weapon and the heavy stone on the farther side.

"Now for it!" he cried.

At the words he raised the pistol to his head, and then let go his grip. In an instant it had been whisked away by the weight of the stone, had struck with a sharp crack against the parapet, and had vanished over the side into the water. It had hardly gone before Holmes was kneeling beside the stonework, and a joyous cry showed that he had found what he expected.

"Was there ever a more exact demonstration?" he cried. "See, Watson, your revolver has solved the problem!" As he spoke he pointed to a second chip of the exact size and shape of the first which had appeared on the under edge of the stone balustrade.

"We'll stay at the inn tonight," he continued as he rose and faced the astonished sergeant. "You will, of course, get a grappling-hook and you will easily restore my friend's revolver. You will also find beside it the revolver, string and weight with which this vindictive woman attempted to disguise her own crime and to fasten a charge of murder upon an innocent victim. You can let Mr. Gibson know that I will see him in the morning, when steps can be taken for Miss Dunbar's vindication."