“Thank you,” said my patient, “but I have felt another man since the doctor bandaged me, and I think that your breakfast has completed the cure. I shall take up as little of your valuable time as possible, so I shall start at once upon my peculiar experiences.”

Holmes sat in his big armchair with the weary, heavy-lidded expression which veiled his keen and eager nature, while I sat opposite to him, and we listened in silence to the strange story which our visitor detailed to us.

“You must know,” said he, “that I am an orphan and a bachelor, residing alone in lodgings in London. By profession I am a hydraulic engineer, and I have had considerable experience of my work during the seven years that I was apprenticed to Venner & Matheson, the well-known firm, of Greenwich. Two years ago, having served my time, and having also come into a fair sum of money through my poor father’s death, I determined to start in business for myself and took professional chambers in Victoria Street.