XV Corps Instruction 18 June 1916
Trench Mortars for information and action.
B.M. 21 D.A.
Noted E.J. Davis
With reference to my 8/2. G.X. of 12-6-1916.
The 2” Trench Mortar Battery which has been provided with personnel from the 25th Division is not to be moved forward when the offensive commences, and must be prepared to be with-drawn from the line with a view to rejoining its Division.
Louis T Vaughan
H.Q. XV Corps.