From: Hekpoort
This Prisoner of War record for Jacob Barnard De Beer 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=14780&r=Jacob Barnard&s=De Beer&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.