Sanders of the River by Edgar Wallace — Read

Mr Commissioner Sanders had lived so long with native people that he had absorbed not a little of their simplicity. More than this, he had acquired the uncanny power of knowing things which he would not and could not have known unless he were gifted with the prescience which is every aboriginal's birthright.

He had sent three spies into the Isisi country--which lies a long way from headquarters and is difficult of access--and after two months of waiting they came to him in a body, bearing good news.