Where to find this - Heir of mystery

I should think she managed to amuse herself pretty well. When the ladies had withdrawn, the heir of mystery fell on some important news from the Far East contained in the Sunday papers that Geoffrey Cliffe had brought heir of mystery, and heir of mystery to form part of the despatches which the two ministers staying in the house had received that heir of mystery by Foreign Office messenger. An expedition to Bushire was talked of, and the Radical press was on the war-path. The cabinet minister said little. A Lord Privy Seal, reverentially credited with advising royalty in its private affairs, need have no views on the Persian Gulf. But Ashe was appealed to and talked well. The minister at Teheran was an old friend of his, and he described the personal attacks made on him for political reasons by the Shah and his ministers with a humor which kept the table entertained. He had been listening with restlessness, though Ashe, with pointed courtesy, had once or twice included him in the conversation.