As we left the house Lestrade remained in the front room, while the repentant constable opened the door to let us out. Holmes turned on the step and held up something in his hand. The constable stared intently.

“Good Lord, sir!” he cried, with amazement on his face. Holmes put his finger on his lips, replaced his hand in his breast pocket, and burst out laughing as we turned down the street. “Excellent!” said he. “Come, friend Watson, the curtain rings up for the last act. You will be relieved to hear that there will be no war, that the Right Honourable Trelawney Hope will suffer no setback in his brilliant career, that the indiscreet Sovereign will receive no punishment for his indiscretion, that the Prime Minister will have no European complication to deal with, and that with a little tact and management upon our part nobody will be a penny the worse for what might have been a very ugly incident.”

My mind filled with admiration for this extraordinary man.

“You have solved it!” I cried.