"For most conspicuous bravery and devotion to duty.
When the right flank of his company was held up by a nest of enemy machine- guns, he, with great courage and initiative, rushed forward under heavy fire with his Lewis gun ,and engaged the position single handed, capturing two machine-guns and twelve prisoners, and killing one officer and two men.
Later in the day he again rushed another enemy machine-gun position, capturing the gun under heavy fire. He was killed immediately after.
His courage and dash were beyond all praise, and it was entirely due to the very gallant conduct of Lance Corporal Seaman that his company was enabled to rush forward to its objective and capture many prisoners."
The London Gazette, 15th November, 1918.