The passage, as well as the room, was full of smoke and the smell of powder.  The window was certainly shut and fastened upon the inside.  Both women were positive upon the point.  They had at once sent for the doctor and for the constable.  Then, with the aid of the groom and the stable-boy, they had conveyed their injured mistress to her room.  Both she and her husband had occupied the bed.  She was clad in her dress—­he in his dressing-gown, over his night-clothes.  Nothing had been moved in the study.  So far as they knew, there had never been any quarrel between husband and wife.  They had always looked upon them as a very united couple.

These were the main points of the servants’ evidence.  In answer to Inspector Martin, they were clear that every door was fastened upon the inside, and that no one could have escaped from the house.  In answer to Holmes, they both remembered that they were conscious of the smell of powder from the moment that they ran out of their rooms upon the top floor.  “I commend that fact very carefully to your attention,” said Holmes to his professional colleague.  “And now I think that we are in a position to undertake a thorough examination of the room.”

The study proved to be a small chamber, lined on three sides with books, and with a writing-table facing an ordinary window, which looked out upon the garden.  Our first attention was given to the body of the unfortunate squire, whose huge frame lay stretched across the room.  His disordered dress showed that he had been hastily aroused from sleep.  The bullet had been fired at him from the front, and had remained in his body, after penetrating the heart.  His death had certainly been instantaneous and painless.  There was no powder-marking either upon his dressing-gown or on his hands.  According to the country surgeon, the lady had stains upon her face, but none upon her hand.

“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?”