Final answer:
Dr. Holmes did not intend for the "speckled band" to attack himself in "The Adventure of the Speckled Band"; his plan to murder his stepdaughters backfired, resulting in his own death.
Step-by-step explanation:
Dr. Holmes in Arthur Conan Doyle's short story The Adventure of the Speckled Band did not intend for the "speckled band," which is revealed to be a venomous snake, to attack himself.
He had been using it as a weapon to murder his stepdaughters for their inheritance. However, his plan backfired due to Sherlock Holmes' intervention. When the snake, agitated by Holmes, returned to Dr. Roylott's room via the bell pull, it attacked him instead, leading to his own death.
In Sir Arthur Conan Doyle's story "The Adventure of the Speckled Band," it is revealed that Dr. Holmes did not intend for the speckled band to attack Dr. Roylott directly. Instead, Dr. Holmes sets up a trap using a ventilator that connects the bedrooms of Dr. Roylott and his stepdaughter Helen Stoner.
The speckled band, which turns out to be a venomous snake, is meant to kill Helen Stoner and eliminate her as an obstacle to Dr. Roylott's inheritance.