From: Box 676, Johannesburg
This Prisoner of War record for Jacobus Adriaan Saris 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=19210&r=Jacobus Adriaan&s=Saris&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.