"Yes, there were several little changes carried out about that time."

"They seem to have been of a most interesting character -- dummy bell-ropes, and ventilators which do not ventilate. With your permission, Miss Stoner, we shall now carry our research into the inner apartment."

Dr. Grimesby Roylott's chamber was larger than that of his step-daughter, but was as plainly furnished. A camp-bed, a small wooden shelf full of books, mostly of a technical character, an armchair beside the bed, a plain wooden chair against the wall, a round table, and a large iron safe were the principal things which met the eye. Holmes walked slowly round and examined each and all of them with the keenest interest.

"What's in here?" he asked, tapping the safe.