From: Waterval
This Prisoner of War record for Philippus Dani Opperman 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=1620&r=Philippus Dani&s=Opperman&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.