“What can it mean?” I gasped.

“It means that it is all over,” Holmes answered.  “And perhaps, after all, it is for the best.  Take your pistol, and we will enter Dr. Roylott’s room.”

With a grave face he lit the lamp and led the way down the corridor.  Twice he struck at the chamber door without any reply from within.  Then he turned the handle and entered, I at his heels, with the cocked pistol in my hand.

It was a singular sight which met our eyes.  On the table stood a dark-lantern with the shutter half open, throwing a brilliant beam of light upon the iron safe, the door of which was ajar.  Beside this table, on the wooden chair, sat Dr. Grimesby Roylott clad in a long grey dressing-gown, his bare ankles protruding beneath, and his feet thrust into red heelless Turkish slippers.  Across his lap lay the short stock with the long lash which we had noticed during the day.  His chin was cocked upward and his eyes were fixed in a dreadful, rigid stare at the corner of the ceiling.  Round his brow he had a peculiar yellow band, with brownish speckles, which seemed to be bound tightly round his head.  As we entered he made neither sound nor motion.

“The band! the speckled band!” whispered Holmes.

I took a step forward.  In an instant his strange headgear began to move, and there reared itself from among his hair the squat diamond-shaped head and puffed neck of a loathsome serpent.

“It is a swamp adder!” cried Holmes; “the deadliest snake in India.  He has died within ten seconds of being bitten.  Violence does, in truth, recoil upon the violent, and the schemer falls into the pit which he digs for another.  Let us thrust this creature back into its den, and we can then remove Miss Stoner to some place of shelter and let the county police know what has happened.”

As he spoke he drew the dog-whip swiftly from the dead man’s lap, and throwing the noose round the reptile’s neck he drew it from its horrid perch and, carrying it at arm’s length, threw it into the iron safe, which he closed upon it.

Such are the true facts of the death of Dr. Grimesby Roylott, of Stoke Moran.  It is not necessary that I should prolong a narrative which has already run to too great a length by telling how we broke the sad news to the terrified girl, how we conveyed her by the morning train to the care of her good aunt at Harrow, of how the slow process of official inquiry came to the conclusion that the doctor met his fate while indiscreetly playing with a dangerous pet.  The little which I had yet to learn of the case was told me by Sherlock Holmes as we travelled back next day.