In The Case of the Ivory Idol, Mr Kling was the cousin of the ruling prince Prince Yuan Sukang. When the brother of the Prince made a bid for power by murdering Prince Yuan, he triggered a revolution and needed to escape from Kahore so he and Kling stole a De Havilland Gipsy Moth belonging to an English planter named Hobbs for their getaway.
Upon reaching London, the brother and Mr Kling approached Biggles and asked him to help retrieve an ivory idol from a temple in Kahore. Although Biggles was suspicious, the Foreign Office was curious as they thought Prince Yuan had died so they asked Biggles to go ahead.
At the site of the temple, Kling went on alone into the vault to check that the statue was still there. Meanwhile, Ginger had stayed outside the temple and met Hobbs who revealed Yuan's brother's plot. Hobbs confronted Yuan's brother, who tried to draw a gun. But Hobbs was quicker and shot the brother. Kling tried to flee from the scene but Hobbs shot him in the back. What started as an attempt to retrieve a statue for religious reasons turned out to be a pure grab for wealth. The hollow idol contained opium inside. Kling was found with two large rubies which he had prised from the eye sockets of the idol during the time he was alone in the vault.