From: Panfontein
This Prisoner of War record for Jan Stephanus Rynard Mostert 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=19933&r=Jan Stephanus Rynard&s=Mostert&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.