Sean M.Harold Higham passed away on 18th of April, 1979 in Pinetown South Africa.
His gravestone is located in the St. John Anglican Church Cemetery and is shared with his wife, Eva Higham (Stockholm).
The Genealogical Society of SA (GSSA)
https://www.graves.eggsa.org/kwazulunatal/PINETOWN-Urban/St-Johns-Anglican-Cemetery/H%20-%20Vanne%20__%20Surnames%20-%20H/HIGHAM%20Harold%201910-1979%20_amp_%20Eva%20Mary%201911-2000.jpg
South African Genealogical Society on Gravestones
https://www.nationalarchives.gov.za/node/1455996