Who was the speckled bands last victim?

The last victim of the "speckled band" in Arthur Conan Doyle's short story "The Adventure of the Speckled Band" is Helen Stoner. She is the stepdaughter of Dr. Grimesby Roylott, who is responsible for the deaths of Helen's sister, Julia, and attempts to kill Helen as well. Julia's mysterious death, which is linked to the sinister "speckled band," serves as the catalyst for Sherlock Holmes's investigation.