There is no exact age in the book, but I would guess mid 50s-60.
Dr. Grimesby Roylott, a character in Sir Arthur Conan Doyle's "The Adventure of the Speckled Band," dies at the end of the story after being bitten by his own venomous snake.
Holmes and Dr. Grimesby Roylott
In the book "The Adventure of the Speckled Band" by Arthur Conan Doyle, Dr. Grimesby Roylott's motive was to maintain control over his stepdaughters' inheritance. By eliminating them, he would secure their money for himself.
Dr. Grimesby Roylott is a cunning and manipulative character in Arthur Conan Doyle's "The Adventure of the Speckled Band." He is portrayed as a menacing and violent man who is willing to do anything to protect his wealth and maintain control over his stepdaughters. Roylott is described as physically imposing, with a quick temper and a tendency towards cruelty.
Dr. Roylott's wife was named Mrs. Stoner.
Julia and Helen Stoner's mother passed away under mysterious circumstances. Dr. Grimesby Roylott, their stepfather, was suspected of being involved in her death, but there was not enough evidence to prove it.
In "The Adventure of the Speckled Band," Dr. Grimesby Roylott is revealed to be a violent and unscrupulous character who seeks to eliminate his stepdaughter, Helen Stoner, to gain access to her inheritance. He uses a trained snake, referred to as the "speckled band," as a murder weapon, which he sends through a vent to kill her. Roylott's actions are driven by greed and a desperate need to maintain his lifestyle, ultimately leading to his own demise when Sherlock Holmes exposes his scheme.
Dr. Grimesby Roylott trains his snake to climb down a false bell pull to bit Julia Stoner in her sleep. So, while the snake's poison kills Julia Stoner, it is widely held that Dr. Roylott is her murderer. -Major Spoiler- At the end of the story, Holmes remarks that he feels no guilt for HIS responsibility in turning the snake on Dr. Roylott. This epitomizes the notion in detective fiction that poetic justice is justice. (Roylott dies at the wrong end of his own tactics)
In Arthur Conan Doyle's story "The Adventure of the Speckled Band," Dr. Grimesby Roylott is depicted as having a sinister relationship with a snake, specifically a venomous snake he trained to kill. He instructs the snake to return to his room after committing the murder of his stepdaughter, Helen Stoner, as part of his nefarious plan to eliminate her and inherit her fortune. This manipulation of the snake underscores Roylott's cruel and calculating nature.
Holmes vs. Dr. Roylott: Dr. Roylott stepped back swiftly forward, seized the poker, and it into curve with his huge brown hands, then Holmesstraightened it out again. Helen vs. Dr. Roylott: Dr. Roylott killed Julia and he wants to kill Helen. Dr. Roylott vs. Nature: Roylott shut himself up in his house and seldom came out save to indulge in ferocious quarrels with whoever might cross his path. Violence of temper approaching to mania has been hereditary in Roylott.
In Arthur Conan Doyle's Sherlock Holmes story "The Adventure of the Speckled Band," the character who lives in the grounds of Stoke Moran is Dr. Grimesby Roylott. He is the antagonist and stepfather of Helen Stoner, the story's female protagonist, who seeks Holmes's help regarding the mysterious death of her sister. Roylott is depicted as a violent and menacing figure, residing in the decaying estate.
Either "Elementary!" or "Elementary, my dear Watson!"