From: Witkoppies
This Prisoner of War record for Cornelius Douw Johannes Cronje was transcribed record from various documents held at the National Archives, South Africa, including arrest and shipping information from newspaper sources like De Zuid-Afrikaan.
https://www.gendatabase.com/boer-war-prisoner-record.php?q=14163&r=Cornelius Douw Johannes&s=Cronje&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.