ref. "Rhodesian Combined Forces Roll of Honour 1966-1981", by Adrian Haggett and Gerry van Tonder.
LG 8 February 1919 - "A pilot of courage and skill, bold in attack and gallant in action, who has accounted for five enemy aeroplanes. On 27th September he attacked fifteen Fokker biplanes that were harassing one of our bombing formations, driving down one in flames. He then engaged a second; in the combat the two machines collided, and the enemy aeroplane fell down completely out of control. Although his machine was badly damaged, Lieutenant Lawson successfully regained our lines."