Seward was later a pilot with No 14 Squadron in the Royal Flying Corps in Palestine from 1916-1918.[3] In 1917, the Martinsyde G.100 he was flying was brought down by Turkish anti-aircraft fire.[4] Seward swam four miles under enemy fire to an outpost of the Wellington Mounted Rifles Regiment, ANZAC. He was subsequently awarded the Military Cross. This was memorialized in a painting, The Seward Exploit, and is in the collection of the Imperial War Museum, RAF Section.[5]
After retiring from the RAF, he had a business career.[6]