What does the coroner

say about Julia's death?

Answer: Adventure of the Specled Band

Explanation:

He also asks if Julia was dressed. Miss Stoner says no, that her sister was in her nightgown, and that she was carrying a burned-out match and matchbox in her hand. She also tells Holmes that the coroner tried to find evidence that would prove Roylott was involved in Julia's death ... There's also no evidence of poison.