I have found the following estate on the National archive site
DEPOT NAB
SOURCE MSCE
TYPE LEER
VOLUME_NO 0
SYSTEM 01
REFERENCE 8989/1924
PART 1
DESCRIPTION DICKINSON, ELMER JOHN. (S/S EDITH FRANCES, BORN WRIGHT-LAMBERT).
STARTING 1924
ENDING 1925
To obtain a copy of the death notice and/or will I suggest that you order it through eggsa.org as this will be quicker than doing it through the archives.
I am looking for information on Dr Elmer John Dickinson who died in Pietermaritzburg in 1924.He was buried in the Church of England Cemetery.