The long necks of the giraffe stood tall as telegraph poles above the flat tops of the acacia trees, while the antelope were insubstantial creamy specks that danced and shimmered in the heat. Here and there masses of what looked like black volcanic rock moved ponderously through the lesser animals, like ocean-going ships through shoals of sardines. These were the mighty pachyderms: rhinoceros and elephant.

It was a scene both primeval and awe-inspiring in its extent and abundance, but to the three watchers on the heights it was commonplace. Their interest was focused on the tiny cluster of buildings directly below them. A spring, which oozed from the foot of the escarpment wall, sustained the patch of greenery that surrounded the buildings of the government boma.

The oldest of the three men wore a kilt of leopard tails and a cap of the same black and gold speckled fur. This was the regalia of the paramount witch doctor of the Nandi tribe. His name was Arap Samoei and for ten years he had led the rebellion against the white invaders and their infernal machines, which threatened to desecrate the sacred tribal lands of his people. The faces and bodies of the men with him were painted for war: their eyes were circled with red ochre, a stripe was painted down their noses and their cheeks were slashed with the same colour. Their bare chests were dotted with burned lime in a pattern that simulated the plumage of the vulturine guinea fowl. Their kilts were made of gazelle skins and their headdresses of genet and monkey fur.

‘The mzungu and his bastard Masai dogs are well into the trap,’ said Arap Samoei. ‘I had hoped for more, but seven Masai and one mzungu will make a good killing.’

‘What are they doing?’ asked the Nandi captain at his side, shading his eyes from the glare as he peered down the precipitous slope.