Issued: 5-Jan-1946, Canada Gazette
"For unparalleled devotion to duty throughout the Battle of the Atlantic. While serving in His Majesty's Canadian destroyers over a long period of time, Lieutenant Johnstone has carried out his duties with the utmost zeal and devotion. As Torpedo Officer of HMCS St. Laurent it has been through his untiring efforts that the electrical equipment has continued to operate at peak efficiency in successful operations against two enemy U-Boats and during 'D-Day' operations."