Trouble in Johannesburg

[inkydave]

Had some fun scouring my (2nd  ) favourite website and found these pics I hadn,t seen before.They are all from 1913/14
apart from brief references read in other books such as Tip and run I know nothing of the civil unrest in SA just before WW1. Can anyone point me in the direction of some further reading please?
Could be some interesting little tabletop scenarios kicking about.   
many thanks