Signals document W.C. Green 13 May 1918.

SECRET

B.M. 374

1^st E. YORK. R. – 5 Copies

9^th K.O.Y.L.I –       5      “

15^th Durh L.I. –      5      “

64^TH T.M. Bty –     2     “

The following light signals between Infantry & Artillery will be taken into use at 12 noon on 16^th May, by Division on left all troops in this Corps:-

(a) S.O.S.                    Rocket, or light, bursting into three white stars.

(b) Gas Attack                        Bouquet of white, green, and red lights.

(c) “We wish to           1 red light.

advance, lengthen range.”

(d) “We are here”        1 white light.

(indicating position of infantry.)

(e) “Our Field Artillery           Worm light.

is firing on us.”

(f) “Our Heavy Artillery         1 coloured light followed by a Worm light.

is firing on us.”

(Sgd) E.D. AIGER

Captain

Brigade Major 64^th Infantry Brigade

13,5,18