For his "conspicuous gallantry and devotion to duty" coupled with displaying the "greatest courage and determination" in the destruction of these aircraft, Cowper was awarded the Military Cross. The announcement and accompanying citation for the decoration was announced in a supplement to the London Gazette on 22 April 1918.
Cowper was honored with the Military Cross for his remarkable gallantry and unyielding commitment to duty, as well as his exceptional courage and determination in eliminating these aircraft. The announcement of this award and its accompanying description were published in a supplement to the London Gazette on 22 April 1918.