Stamp H.Q. 4th Div. Artillery
4th Div. G.S. 24/11
C.R.A. 4th Div.
With a view to testing S.O.S. communication by Light Signal, 10th, 11th, and 12th Inf. Brigs. will please arrange to fire one GREEN Rocket or Very Light at following times on evening 14th instant:-
10th Inf. Brig. front – 10 p.m.
(Left Battalion) 11th Inf. Brig. battn – 10.30 p.m.
12th Inf. Brig. front – 10.45 p.m.
General Staff, 4th Division.
13th July, 1917.
Copy to 4th Div. Q.
23rd Bde. R.F.A.
29th Bde. R.F.A.
32nd Bde. R.F.A.
1. Ref. Min. 1. Each Brigade will fire 1 round per Battery on S.O.S. Lines when the signal goes up on the Battalion Front covered by that Brigade.
2. Watches will be synchronised at 7.30 pm to-day.
3. Times lights are observed and firing of guns will be carefully noted and reported to this H.Q.
C.S. Jones, Major R.A.
Bde. Major 4th Divisional Arty.