Conversation so far:
How did the Boer war start?
Many historians stress that in reality the contest was for control of the rich Witwatersrand gold-mining complex located in the SAR.
What were the Boer Commandos?
The Boer commandos were volunteer military units of guerilla militia organized by the Boer people of South Africa. The term came into English usage during the Second Boer War
Who were the Boer War sharpshooters?
The 3rd County of London Yeomanry was a Yeomanry regiment of the British Army. It was raised in 1901 from Second Boer War veterans of the Imperial Yeomanry.
What were the Boer War sharpshooters used for?
these scouts were well practised in the arts of marksmanship, field craft, map reading, observation, and military tactics.
Were there also non-sharpshooters that fought on the same side with the Sharpshooters?

Question: How were sharpshooters found or recruited?
Self-contained rewrite: How were Boer War sharpshooters found or recruited?