The following information on Commisioned Officers who served with 138 Heavy Battery RGA has been extracted from the Battery's War Diary and from Walter Wright's Narrative published in 1926. Every reference to an individual has been included, whatever its significance, in an attempt to provide as complete a list as possible.

Annesley, Lt
Forward Observation Officer on 21 March 1918
Taken prisoner 21 March 1918, escaped the same day.

Bailey, G W, 2/Lt
Posted from BEF to assist Capt Paris in formation of 138 HB, Autumn 1915
Billeted at Houchin, 18 April 1916
Struck off strength (unfit to return from England), 12 October 1916.

Barnes, A F, 2/Lt
Joined Battery from 136 Siege Battery, 19 April 1917
With Right and Centre Sections on march to Ypres, 28 May 1917.

Coomber, H A, Lt
Commanded the pulling out of guns, 22 March 1918
Died of wounds received, 5 April 1918
Awarded MC.

Dupree, C V, 2/Lt
Section Commander, Left Section, 18 May 1917.

Gordon, W E, 2/Lt
i/c Observation Party, 18 May 1917
Seriously burned, removed to hospital, 27 June 1917.

Greenhough, B S, 2/Lt, later Lt
Posted from BEF to assist Capt Paris in formation of 138 HB, Autumn 1915
Billeted at Mazingarbe, 18 April 1916
Present at the death of Major Paris, 6 October 1918.

Hill, R A, 2/Lt, later Lt
Posted to 138 HB, September 1915
Billeted at Philosphe, 18 April 1916
Promoted to 1st Lt, with effect from 1 October 1916
Killed in action, 10 April 1917.

Johnson, S T, 2/Lt, later Captain
Posted to 138 HB, September 1915
Billeted at Bully, 18 April 1916
Promoted to 1st Lt, 1 October 1916
On leave in England, 1 February to 17 February, 1917
With Right and Centre Sections on march to Ypres, 28 May 1917.

Lumley, Capt, later Major
Posted from 137 HB to command of 138 HB following the death of Major Paris, October 1918.

Marshall, 2/Lt
Posted from BEF to assist Capt Paris in formation of 138 HB, Autumn 1915.

Maye, S E, Lt
Returned off leave from England, 29 January 1917
Left Battery for other responsibilities, 5 March 1917
With Right and Centre Sections on march to Ypres, 28 May 1917
Seriously burned, removed to hospital, 27 June 1917.

Mitchell, Arthur, Major
Posted as Officer Commanding 138 HB, March 1916
Proceeded to England on leave, 31 August 1916
Assumed temporary command of 67th HA Group, 15 January 1917
Relinquished command of 67th HA Group, 25 January 1917
Proceeded to England, 25 January 1917
Returned from England after 14 days Siege Course, 15 February 1917
Awarded Distinguished Service Order.

Paris, Harold Graham, Major
Commanding Officer, March 1917 to October 1918

Patch, G A J M, 2/Lt
Left Battery to take up post as Intelligence Officer, 18 March 1917.

Pearce, A H, 2/Lt, later Captain
Joined 138 HB, 25 April 1916, and proceeded for duty to Bully
Awarded the Military Cross, 2 January 1917
Took command of 138 HB as Lt, 19 January 1917
Relinquished command of 138 HB to Major Paris, March 1917.