Hi Jack
The National Archives in Pretoria have the following documents, a researcher as listed on this site could get it for you
Regards
Adrian
Johannesburg
:
DEPOT TAB
SOURCE SAC
TYPE LEER
VOLUME_NO 66
SYSTEM 01
REFERENCE B1006
PART 1
DESCRIPTION RECORD OF CONDUCT AND SERVICE OF SOUTH AFRICAN CONSTABULARY EDGAR
ETCHES.
STARTING 1900
ENDING 1905