Stoke Moran in western Surrey, England.
Helen stoner is one of the important character in the story "The Adventures of the speckled band".
"His name is Armitage - Percy Armitage - the second son of Mr. Armitage, of Crane Water, near Reading." -- Helen Stoner, 'The Adventure of the Speckled Band'
"In her right hand was found the charred stump of a match, and in her left a matchbox." -- Helen Stoner, 'The Adventure of the Speckled Band'
Their names are Helen and Julia Stoner, and they are not only sisters but twins as well.
"Shortly after our return to England my mother died - she was killed eight years ago in a railway accident near Crewe." -- Helen Stoner
In the story "The Adventure of the Speckled Band" by Sir Arthur Conan Doyle, Helen Stoner's twin sister Julia said "The band! The speckled band!" before she died. These were her last words before succumbing to the mysterious circumstances surrounding her death.
Julia Stoner. "Julia went there at Christmas two years ago, and met there a half-pay Major of Marines, to whom she became engaged." -- Helen Stoner, 'The Adventure of the Speckled Band'
This is an excellent question since "swamp adders" (or snakes) do not have external ears, but I am certain that the intent of the whistle was to recall the reptile to its owner.
Helen Stoner heard a low whistle and a metallic clang after being awakened by her sister's scream. These sounds were mentioned in Sir Arthur Conan Doyle's Sherlock Holmes story "The Adventure of the Speckled Band."
"As to reward, my profession is its reward; but you are at liberty to defray whatever expenses I may be put to, at the time which suits you best." -- Sherlock Holmes, The Adventure of the Speckled Band
"It is my belief that [my sister Julia] died of pure fear and nervous shock, though what it was which frightened her I cannot imagine." -- Helen Stoner, 'The Adventure of the Speckled Band'
dramatic irony- in the introduction the audience( us ) had already got to know that Dr. Roylotts will die