From: Achalia
This Prisoner of War record for Barend Gabriel Oosthuizen 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=16006&r=Barend Gabriel&s=Oosthuizen&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.