From: Boschfontein
This Prisoner of War record for Andries Johannes Van Der Merwe 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=12424&r=Andries Johannes&s=Van Der Merwe&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.
