Histories of the commandos are rarely documents. A recent
publication had been produced on the Boksburg Commando and is available
for £4 ex p&p at this site.
http://www.cangrow.co.uk/who-actually-captured-winston-churchill.html
The Boksburg Commando was famous for the capture of Winston Churchill at
Chieveley as well as the capture of the British guns at Colenso.