A shade of anxiety seemed to me to cross my companion’s expressive face.

“Do you mean that you are on the right track?” he asked.

“The right track! Why, sir, we have the man under lock and key.”

“And his name is?”

“Arthur Charpentier, sublieutenant in Her Majesty’s navy,” cried Gregson, pompously, rubbing his fat hands and inflating his chest.

Sherlock Holmes gave a sigh of relief, and relaxed into a smile.

“Take a seat, and try one of these cigars,” he said. “We are anxious to know how you managed it. Will you have some whiskey and water?”