From: Bankdrift
This Prisoner of War record for Petrus Hendrik Stefanus Groenewald 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=12249&r=Petrus Hendrik Stefanus&s=Groenewald&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.
