Captain Addison Alexander Mackenzie, Lieutenant Buston, and Lieutenant Muirhead Add to clipboard CA ON00373 MG 30-MG 30-M010.7 · Item · 1917 Part of Mackenzie family fonds [textual record and other material] Postcard of Captain Addision Alexander Mackenzie, Lieutenant Buston (who died of wounds), and Lieutenant Muirhead during WWI.