From: Zooekraal
This Prisoner of War record for Jacobus Nicolaas Van Ryneveld 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=617&r=Jacobus Nicolaas&s=Van Ryneveld&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.