Thanks: I've contacted Cody Museum, Winchester Collectors Association and the South African Military Historical Society, to name a few. However, no real Joy yet. I've looked through the Imperial surname list of the Anglo-Boer War Historical Society without success, although I suspect that this would more-likely be a Boer-Dutch/German/Swiss
surname, and I'm not sure just how inclusive the list is. Unlikely to be Boer, given that most combatants would not have had the means or skills to strike their initials on a gun barrel. Most would have carved them in the stock, as they did with their Mausers.