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This Boer-War Soldier record for George E Milles (Earl) SONDES was transcribed record from various documents held at the National Archives, South Africa. Data contained in this set is known as "The Soldiers of the Queen".
https://www.gendatabase.com/boer-war-soldiers-record.php?q=253792&r=George E Milles (Earl)&s=SONDES&ref=