The "grandfather of conservation" Dr. Ian Player has passed away at the age of 87. Among his contributions, Dr. Player is known for his success in bringing the white rhino back from the brink of extinction.
In 1895 when the Umfolozi Reserve was begun, it was the last refuge for white rhinos. They had been wiped out by hunting everywhere else in South Africa. Dr. Player led the crusade to save the species by re-locating rhino to other unpopulated areas (much as Kruger is attempting to do now).
Initial method of rhino transport included darting the rhino and following on horseback until it stopped, then jumping down from the horse to quickly manhandle it into a crate for transport. There was a "considerable death toll", as it took trial and error to devise the best cocktail of tranquilizer and the best method of capture and transport.
In The White Rhino Saga, Dr. Player refers to it as "a series of derring-do with a fair roll call of human and animal casualties." But eventually the technology worked and the relocation of the rhinos began.