From: Pretoria
This Prisoner of War record for Adrian Wilhelmus Van Leer 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=18021&r=Adrian Wilhelmus&s=Van Leer&ref=
This set of Prisoner of War documents can be accessed online via the FamilySearch.org project by Clicking Here.