From: Johannesburg
This Prisoner of War record for Arend Jacobus Hendrik Ouderstal 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=11601&r=Arend Jacobus Hendrik&s=Ouderstal&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.