Dave. not sure where your source lies. But This is in the book i'm reading. I think your find this has already been spoke about before on the forum.
But let's not forget the British put John Dunn in a very awkward position. He stood the chance of losing everything.
Perhaps the green-eyed monster had crept in somewhere, see highlighted in yellow.
" After Isandhlwana, J, Dunn sent a message to Cetshwayo saying that if he wished to be king of the ' whole country .now was the time for him to strike a blow, as there was only one column now to resist him, And this double-dyed traitor has been just appointed by Sir G. Wolseley to be ruler of the largest of his thirteen provinces, where, with his native wives and concubines, to whom he may add at his pleasure, he will set a splendid example of morality.However, Cetshwayo did not yield to Mr. J. Dunn's advice, and refused all along to ravage the" colony when he had it completely at his mercy. And now we see the reward he gets for such moderation."
Source: Colenso, Bishop of Natal