THE ADVENTURE OF THE COPPER BEECHES by Sir Arthur Conan Doyle

Violet Hunter seeks the help of Holmes when she discovers some strange things about a new position as governess for Mr. Jephro Rucastle, a strange man. This man insists to hire Hunter and has raise the salary twice to persuade her to take the job. He also has a vicious mastiff dog who's he seldom fed and the dog is off leash every night. But on top of all, Rucastle seems to keep someone as his secret prisoner...

First published in the Strand Magazine, June 1892, with 9 illustrations by Sidney Paget.