Books

In this remarkable autobiography ex-Chief Inspector Percy Burgess of the C.I.D.
  tells of the challenge he accepted when he became Chief Security Officer of the
  Williamson Diamond Mine at Mwadui, Tanganyika. As he suspected, pressure of 
  circumstances had virtually forced his appointment upon Dr. Williamson, owner of
  reputedly the world's richest diamond mine; and in a place where scarcely any 
  security organisation existed Burgess set to work to bring some order out of chaos.
  This book is of the tremendous difficulties Burgess had to face and overcome - with
  little help, it may be said, from Dr. Williamson, the brilliant Canadian geologist who 
  discovered and owned the mine. From the absorbing background of Diamonds
  Unlimited emerges the first full-length portrait of Dr. Williamson, the eccentric
  individualist who was potentially one of the world's richest men and yet an oddly 
  simple, unpredictable and perverse personality.
  The objectivity and perception of a London policeman in one of the strangest and
  remotest parts of Africa throw new light on some problems of the continent and
  bring to life without exaggeration or romanticism a picture of a extra-ordinary man in 
  extraordinary circumstances.

THE DIAMOND SEEKER - The story of John Williamson by JOHN GAWAINE
Published by MACMILLAN South Africa - 1976
John Williamson, a Canadian  graduated brilliantly in Geology from McGill University
  in Montreal, obtaining a B.A., M.Sc., and Ph.D. all in the space of four years.
  He was a man with a dream, and the faith and tenacity to carry on beyond all reasonable
  human limits to prove his conviction - that a rich diamond pipe existed south of Lake
  Victoria in Tanganyika.
  Year after year with his two faithful African helpers, he toiled under the pitiless sun in the
  fever-ridden Territory, suffering appalling privations as his debts mounted and prospects 
  faded.
  THE DIAMOND SEEKER is the story of Williamson's supreme dedication and courage
  that at times kept him just one step ahead of despair in the face of almost 
  insurmountable odds until success beyond all measure at last crowned his efforts.
  Success, however, that would have been thwarted as it lay within reach, but for the love
  of a beautiful woman and the material support of an Asian lawyer. Success, too that 
  brought prosperity and benefits to impoverished Tanganyika, made a major contribution
  to the British was effort in the Second World War, and earned Williamson a vast personal fortune.
  This stranger-than-fiction true story gives an enthralling insight into the great and complex personality 
  of John Williamson - the brilliant academic and bar-room practical joker, ruthless yet 
  extravagantly generous, tough rugged and tender, the loner and the life-and-soul of the party, 
  the womaniser and idealist who could command lifelong devotion from a woman, yet never married. 
  Men loved or hated him, but none could ever ignore him.

For further book review: http://www.debeersgroup.com/debeersweb/About+De+Beers/De+Beers+World+Wide/Dr+John+Thornburn+Williamson.htm