Jewels of Gwahlur by Robert E. Howard

Conan wheeled supply, sweeping the shadows with a fiercely questing stare. There was no sign of the murdered man's body; only yonder the tall lush grass was trampled and broken down and the sward was dabbled darkly and wetly. Conan stood scarcely breathing as he strained his ears into the silence. The trees and bushes with their great pallid blossoms stood dark, still, and sinister, etched against the deepening dusk.

Primitive fears whispered at the back of Conan's mind. Was this the work of the priests of Keshan? If so, where were they? Was it Zargheba, after all, who had struck the gong? Again there rose the memory of Bit-Yakin and his mysterious servants. Bit-Yakin was dead, shriveled to a hulk of wrinkled leather and bound in his hollowed crypt to greet the rising sun for ever. But the servants of Bit-Yakin were unaccounted for. There was no proof they had ever left the valley.