Behind that Curtain – Earl Derr Biggers – Platanus Publishing

"A gay crowd of Anglo-Indians gathered one night fifteen years ago on a hill outside Peshawar to watch the moon rise over that isolated frontier town. Among the company were Captain Eric Durand and his wife, just out from home. Eve Durand was young, pretty and well-born—a Miss Mannering, of Devonshire. Some one proposed a game of hide-and-seek before the ride back to Peshawar. The game was never finished. They are still looking for Eve Durand. Eventually all India was enlisted in the game. Jungle and bazaar, walled city and teak forest, were fine-combed for her."