The detective mounted on the chair, pushed the skylight further open, and thrust out his head and shoulders. He examined the surface of the slates outside, and chuckled softly to himself. “Captain Ensor lives next door, I understand,” he said, withdrawing his head and addressing Mrs. Drury. “Am I right in supposing that he lives on the left of this?” “Yes.” “Will there be anybody in the house at the present moment?” Mrs. Drury started. “His servant will be in, I suppose, but nobody else,” she said. “But why—? “Ask no questions,” interrupted Sexton Blake. “Just go back to your husband, and I’ll join you later.” As he uttered these words he hauled himself through the skylight and crawled along the slates till he came to the skylight of Captain Ensor’s house. It was also open. He lowere

