Quotation from: The Beasts of Tarzan

Written by: Edgar Rice Burroughs

In this Tarzan saw the cunning hand of Rokoff. The Russian
was attempting to make travel as difficult as possible for him by
turning the natives against him in superstitious fear.

The native further told Tarzan that the white man who had led the
recent expedition had promised them a fabulous reward if they would
kill the white devil. This they had fully intended doing should
the opportunity present itself; but the moment they had seen Tarzan
their blood had turned to water, as the porters of the white men
had told them would be the case.