Medicinal and Poisonous Plants of Southern and Eastern Africa 2nd Edition, 1962
By Maria Gerdina Watt, John Mitchell and Breyer-Brandwijk (Author)
This edition is a "one of it's kind" as it was autographed by Breyer and presented to my mother, VC Neethling.
I have looked at the condition of these books available on the internet, and I have seen none that are in as good a condition as this one.
This edition is really hard to get hold of, and only a portion of it is available in the Internet Archive: https://archive.org/details/in.ernet.dli.2015.218558/page/n1/mode/2up