“Well, well, we score over you for once, Mr. Holmes. You must give us best this time.” He struck his stick sharply upon the ground, on which a cabman, his whip in his hand, sauntered over from a four-wheeler which stood on the far side of the street. “May I introduce you to Mr. Sherlock Holmes?” he said to the cabman. “This is Mr. Leverton, of Pinkerton’s American Agency.”

“The hero of the Long Island cave mystery?” said Holmes. “Sir, I am pleased to meet you.”

The American, a quiet, businesslike young man, with a clean-shaven, hatchet face, flushed up at the words of commendation. “I am on the trail of my life now, Mr. Holmes,” said he. “If I can get Gorgiano⁠—”

“What! Gorgiano of the Red Circle?”