Once home from our trip, I asked Grandma Google about "H.B. Potter Zululand South Africa" and learned a little about this Potter fellow. Apparently born in England, Harold B. Potter lived with his wife, son and daughter in/near Zululand Park and was a great "mover and shaker" in the conservation of the local wild animals. He was appointed Game Conservator in 1929 and was still actively working in the late 1940s.
One link I found was: Images of ‘Wild Africa’: Nature tourism and the (re) creation of Hluhluwe game reserve, 1930-1945 by Shirley Brooks. It tells much about what Potter did and not too much about who he was. The link is: http://www.kznhass-history.net/files/seminars/Brooks2003.pdf