He went down on his knees, examining it minutely—even going so far as to smell it.

Finally, he poured a few drops of the coco into a test tube, sealing it up carefully. His next proceeding was to take out a little notebook.

“We have found in this room,” he said, writing busily, “six points of interest. Shall I enumerate them, or will you?”

“Oh, you,” I replied hastily.

“Very well, then. One, a coffee-cup that has been ground into powder; two, a despatch-case with a key in the lock; three, a stain on the floor.”


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my mother is very ill. She seems to be having some kind of fit. Unfortunately she has locked herself in.”

“I’ll come at once.”

I sprang out of bed; and, pulling on a dressing-gown, followed Lawrence along the passage and the gallery to the right wing of the house.

John Cavendish joined us, and one


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