Issued: 16-Jun-1945, Canada Gazette
"Sub-Lieutenant Sheppard, prior to his promotion, served aboard HMCS Rosthern as an Able Seaman. He showed marked alertness, coolness and efficiency in detecting by Asdic and reporting the presence of an enemy submarine. By his prompt action, the probable destruction of his ship and the loss of many of the ship's company were averted, as two torpedoes from the U-Boat were fired at the ship within a minute after he gained contract."