“I hope you observed all precautions, Mrs. Hudson?” said Holmes.

“I went to it on my knees, sir, just as you told me.”

“Excellent. You carried the thing out very well. Did you observe where the bullet went?”

“Yes, sir. I’m afraid it has spoilt your beautiful bust, for it passed right through the head and flattened itself on the wall. I picked it up from the carpet. Here it is!”

Holmes held it out to me. “A soft revolver bullet, as you perceive, Watson. There’s genius in that, for who would expect to find such a thing fired from an airgun? All right, Mrs. Hudson. I am much obliged for your assistance. And now, Watson, let me see you in your old seat once more, for there are several points which I should like to discuss with you.”