From: Harrismith
This Prisoner of War record for Willem Frederik K Withmar 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=8881&r=Willem Frederik K&s=Withmar&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.