And here is a book to consider from Amazon.com:
Dead Countries of the Nineteenth and Twentieth Centuries
( Aden to Zululand )
by Les Harding
Has 2 five star reviews! ; "...if you want to know more about Bechuanaland, this book is for you." ... "Have been collecting for sixteen years ... three-quarters of my life, and this is the book I have been waiting for a very long time. Kudos to Mr. Harding for this book."