Rank: Trooper
This Boer-War Soldier record for Michael Heffernan O BRIEN 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=196082&r=Michael Heffernan&s=O BRIEN&ref=
