To the right of him and close by, he heard a “Pssst,” and turning his head toward the sound saw a skinny arm with a crooked forefinger at the edge of a latticework thickly covered with leaves and purple bougainvillaea.

Sauntering toward the latticework, he lit a cigarette and flipped the match away. The sepulchral voice of the gnomelike little man who had accosted him inside came from behind the screening vine.

“Pretend you are interested in the flowers while I deliver my final instructions.”

A grin quirked Shayne’s wide mouth. He obeyed instructions by leaning forward and sniffing a flamboyant, odorless blossom.

“The Duke must be notified at once, of course, but inform Scotland Yard that they must attempt no action. My life is in constant danger while I remain here.”

“Then why don’t you leave? Your work is finished, isn’t it?”

“Don’t you understand that I can’t leave?” the little man demanded with asperity. “I gained entry by feigning insanity and I’ve played the role so perfectly they think I am insane.”

“That,” Shayne agreed, “makes it tough.”

“And I couldn’t desert my post while the scoundrels are still plotting against the Kingdom,” the withered shade of Sherlock Holmes insisted. “I don’t know what new devilish stratagem is afoot, but I believe I have discovered why the Duchess was executed last night. They have substituted another female in the dungeon disguised as the Duchess. Soon I hope to have a clue. I’ll communicate with you by Code X 4 9 B X. The password is Audentes fortuna juvat. You may go now.”

Shayne said, “Thanks.” He turned away and went down the path. An orderly, smiling knowingly, came forward to unlock the heavy wooden gate.