Holmes’s quiet day in the country had a singular termination, for he arrived at Baker Street late in the evening, with a cut lip and a discoloured lump upon his forehead, besides a general air of dissipation which would have made his own person the fitting object of a Scotland Yard investigation. He was immensely tickled by his own adventures and laughed heartily as he recounted them.

“I get so little active exercise that it is always a treat,” said he. “You are aware that I have some proficiency in the good old British sport of boxing. Occasionally, it is of service; today, for example, I should have come to very ignominious grief without it.”

I begged him to tell me what had occurred.