The Wizard by H. Rider Haggard

Once she was outside of Owen's house, Noma did not tarry. First she returned to Hokosa's kraal, where she had already learnt from his head wife, Zinti, and others the news of his betrayal of the plot of Hafela, of his conversion to the faith of the Christians, and of the march of the _impi_ to ambush the prince. Here she took a little spear, and rolling up in a skin blanket as much dried meat as she could carry, she slipped unnoticed from the kraal. Her object was to escape from the Great Place, but this she did not try to do by any of the gates, knowing them to be guarded. Some months ago, before she started on her embassy, she had noted a weak spot in the fence, where dogs had torn a hole through which they passed out to hunt at night.

To this spot she made her way under cover of the darkness -- for though she still greatly feared to be alone at night, her pressing need conquered her fears -- and found that the hole was yet there, for a tall weed growing in its mouth had caused it to be overlooked by those whose duty it was to mend the fence. With her assegai she widened it a little, then drew her lithe shape through it, and lying hidden till the guard had passed, climbed the two stone walls beyond. Once she was free of the town, she set her course by the stars and started forward at a steady run.