Roylott's, the second my sister's, and the third my own. There is no communication between them, but they all open out into the same corridor. Do I make myself plain?"
"Perfectly so."
"The windows of the three rooms open out upon the lawn. That fatal night Dr. Roylott had gone to his room early, though we knew that he had not retired to rest, for my sister was troubled by the smell of the strong Indian cigars which it was his custom to smoke. She left her room, therefore, and came into mine, where she sat for some time, chatting about her approaching wedding. At eleven o'clock she rose to leave me, but she paused at the door and looked back.
"'Tell me, Helen,' said she, 'have you ever heard anyone whistle in the dead of the night?'
"'Never,' said I.
"'I suppose that you could not possibly whistle, yourself, in your sleep?'
"'Certainly not. But why?'
"'Because during the last few nights I have always, about three in the morning, heard a low, clear whistle. I am a light sleeper, and it has awakened me. I cannot tell where it came from--perhaps from the next room, perhaps from the lawn. I thought that I would just ask you whether you had heard it.'
"'No, I have not. It must be those wretched gipsies in the plantation.'
"'Very likely. And yet if it were on the lawn, I wonder that you did not hear it also.'
"'Ah, but I sleep more heavily than you.'
"'Well, it is of no great consequence, at any rate.' She smiled back at me, closed my door, and a few moments later I heard her key turn in the lock."
"Indeed," said Holmes. "Was it your custom always to lock yourselves in at night?"
"Always."
"And why?"
"I think that I mentioned to you that the doctor kept a cheetah and a baboon. We had no feeling of security unless our doors were locked."
"Quite so. Pray proceed with your statement."
"I could not sleep that night. A vague feeling of impending misfortune impressed me. My sister and I, you will recollect, were twins, and you know how subtle are the links which bind two souls which are so closely allied. It was a wild night. The wind was howling outside, and the rain was beating and splashing against the windows. Suddenly, amid all the hubbub of the gale, there burst forth the wild scream of a terrified woman. I knew that it was my sister's voice. I sprang from my bed, wrapped a shawl round me, and rushed into the corridor. As I opened my door I seemed to hear a low whistle, such as my sister described, and a few moments later a clanging sound, as if a mass of metal had fallen. As I ran down the passage, my sister's door was unlocked, and revolved slowly upon its hinges. I stared at it horror-stricken, not knowing what was about to issue from it. By the light of the corridor-lamp I saw my sister appear at the opening, her face blanched with terror, her hands groping for help, her whole figure swaying to and fro like that of a drunkard. I ran to her and threw my arms round her, but at that moment her knees seemed to give way and she fell to the ground. She writhed as one who is in terrible pain, and her limbs were dreadfully convulsed. At first I thought that she had not recognised me, but as I bent over her she suddenly shrieked out in a voice which I shall never forget, 'Oh, my God! Helen! It was the band! The speckled band!' There was something else which she would fain have said, and she stabbed with her finger into the air in the direction of the doctor's room, but a fresh convulsion seized her and choked her words. I rushed out, calling loudly for my stepfather, and I met him hastening from his room in his dressing-gown. When he reached my sister's side she was unconscious, and though he poured brandy down her throat and sent for medical aid from the village, all efforts were in vain, for she slowly sank and died without having recovered her consciousness. Such was the dreadful end of my beloved sister."
"One moment," said Holmes, "are you sure about this whistle and metallic sound? Could you swear to it?"
"That was what the county coroner asked me at the inquiry.