42 Infantry Brigade Signals note 3 April 1918



42nd Inf Bde.

S 6/113 B.M.

5th Oxf & Bucks L.I.

5th Shrops L.I.

9th K.R.Rif.C.

9th Rif Brig.

42nd Machine Gun Company.

42nd Trench Mortar Battery.

8th Inf Bde.

9th Inf Bde.

41st Inf Bde.

43rd Inf Bde.

76th Inf Bde.

14th Division

14th Div’l Signals.


No 3 Section Signals (3 Copies).

No 8 Squadron R.F.C. (2 Copies).

14th Divl Artillery (5 Copies)



  1. Herewith copy (or copies) of Instructions for Communications in the 42nd Inf Bde during forthcoming Operations.
  2. Where more than one copy has been sent the additional copies are for distribution as considered suitable.
  3. O.C. Battalions of 42nd Inf Bde will ensure that their Signalling Officers are fully acquainted with these instructions. If doubt exists regarding any points, their Signalling Officer should arrange to see the Brigade Signalling Officer with regard to them.
  4. Please acknowledge.


B Jagel


Bde Major

42nd Inf Bde.

3rd April 1918.






  • From W Day until ZERO Battalions will be in communication with Advanced Brigade H.Q. at G.34.b.95.70 (Position Call J.P. 50) through which office communication with Covering Artillery Advanced Dressing Station and Advanced Transport Lines can be obtained.
  • At ZERO telephone lines will be switched over to Brigade Command Post at M.5.b.60.90 (Station call Z.D.B.)
  • The B.T.O. will detail orderlies for duty at the Signal Office in Advanced Transport Lines.
  • The following are positions where telephone offices will be situated from W to Z Day inclusive:-


Position of                   Position           Locality           Map Reference

Telephone Office        Call


Advanced Bde HQ     J.P.50              ——-               G.34.b.95.70.

Adv Dressing Stn.      J.P.63              HUNTER        G.35.d.10.85.


Battalion H.Q.                        H.L.                 HUN L            G.35.d.50.05.

Battalion H.Q.                        J.P.3                HUNTER        G.35.d.15.90.


Battalion H.Q.                        B.A.                MIDDLESEX            M.5.b.65.60.


Battalion H.Q.                        B.B.                 HOG LINE     M.5.b.83.95.

Bde Command Post    B.C.P.             HOG LINE     M.5.b.60.90.



  • As soon as the situation allows, a line will be extended and an advanced Signal Office established in the Old Battery Position at M.6.d.40.30 (Call B.P.)
  • Battalions will send messages, for transmission from that Office, by runner.

NOTE.  Reference para (a) Fullerphone with telephone in series will be installed in each Battalion H.Q. but the former must be used in preference to the latter whenever possible owing to their being no possibility of its being overheard by the enemy.


  1. VISUAL.

(a). Brigade Receiving Station (Call Z.D.B.) will be established at M.5.b.60.90 equipped with Lucas Lamp, Helio, and Dietz Disc.


(b). Z.D.B. will receive from Station established in Old Battery position at M.6.d.40.30 (Call B.P.). B.P. will be manned by Signallers of the 5th Oxf & Bucks L.I., one N.C.O. and 3 men, and will be equipped with Lucas Lamp, Helio, and Dietz Disc.  The Lucas Lamp will be employed in preference to the other instruments.  The Station will be regarded as a transmitting centre for messages from all Battalions.  Messages must be short and concise and will be sent from Battalion H.Q. by Runner to the Visual Station (B.P.)


(c). Personnel for B.P. will proceed to take up position about 15 minutes in rear of Battalion.  A series of dashed will be sent until O.K. is given by Z.D.B.


(d). The method of sending from B.P. will be as follows:-


The prefix will be sent repeatedly until answered by “G” when the prefix will be sent once more followed by code time, number of words, “address to”, text, “address from” and V.E.; Office of origin and service instructions will not be sent; after V.E. the whole message will be repeated immediately and the second V.E. given; if the message has been correctly received the answer R.D. will be sent; should R.D. not be given the message will be repeated until acknowledged by the Receiving Station. R.D. will be answered by ”T”.



(a). Pigeon men with birds should be detailed to accompany definite Officers. It is hoped to be able to supply two pairs of birds to each of the following:-

5th Oxf & Bucks L.I.

5th Shrops L.I.

9th K.R.Rif.C.

(b). A forward dump of birds will be formed in Advanced Brigade H.Q. G.34.b.95.70.

(c). Immediately any birds have been released, a pigeon man should be sent back to the dump with the empty basket to fetch more pigeons.

(d). Battalions must ensure that they are in possession of message book, refill and spare clips.

(e). On release the birds fly to the Loft near Div’l H.Q. Average time taken is 9 minutes.  From the Loft the message is telegraphed to the addressee and diatelegrams delivered direct by Special D.R.

(f). Code names should be used in the messages: remainder may be sent in clear. Care should be taken to enter on the message the time at which it is written.  Diagrams whenever possible should accompany report.  They must however be made on the special message form.

(g). A copy of every pigeon message should be sent by the next Runner endorsed ”COPY ORIGINAL SENT BY PIGEON AT (Time)”.  Runners should not be sent specially.



(a). One Power Buzzer is allotted to this Brigade (Call – C.S.)

(b). The Amplifier will be installed in LEWEN SCHANZE (M.5.d.70.40.) and manned by Signal Service personnel. The call for this Station will be Z.D.C.  It will receive also from Power Buzzer on the 43rd Inf Bde Front (Call C.Q.).  The  notes of the two Buzzers will be so adjusted that they can be distinguished and the adjustment will be made before the instruments are sent forward.  Base lines of all instruments will be North and South.

(c). The Power Buzzer will move forward with the 9th K.R.Rif.C. H.Q.  For this purpose the 9th K.R.Rif.C. will detail 4 men instructed in the use of the Power Buzzer.

(d). The 5th Shrops L.I. will detail 4 Signallers, similarly instructed, to follow 10 minutes in rear of their Battalion H.Q. and take over the Power Buzzer from the 9th K.R.Rif.C. and proceed to re-instal it in Battalion H.Q. at Second Objective.

(e). They in turn will hand the instrument over to personnel detailed by the relieving unit.

(f). Messages, which must be as short and concise as possible, may be sent in clear except names of units. For these, Code Names must be used.  Messages will be sent slowly three times in succession with short interval.  The whole message, less ’Office of Origin’ and ’Service Instructions’ will be sent.

(g). A copy of every message sent by Power Buzzer should be sent by next Runner endorsed ”COPY ORIGINAL SENT BY POWER BUZZER AT (Time)”.

(h). It must be remembered that the Power Buzzer can be overheard by the enemy.


  • One Trench Wireless Set is allotted to this Brigade.
  • One Officer and Carrying Party of 4 men trained in the erection of the set will be detailed by the 9th Rif Brig to take charge of the Station. The operating will be done by Signal Service personnel.  The Officer in charge will keep the set packed up and in readiness in a dugout near Brigade Command Post, to go forward as soon as the Second Objective has been gained and consolidated.  The Officer will then take his party forward with the set and report to O.C. 5th Shrops L.I.  It will be the duty of the Officer in charge of the set to keep in touch with the Brigade Staff and to find out directly the captured position is sufficiently consolidated to make it feasible to bring the Wireless Station into to
  • C. 5th Shrops L.I. will if possible, select a suitable dugout or shelter in the captured position, preferably in a Battalion H.Q. He will if necessary provide a guide to the site selected.
  • The call of the Station will be Y.M.M/. and it will work to Y.U. (..–) situated at ACHICOURT which is in telephone communication with VII Corps.

The station will subsequently be handed over to personnel detailed by        the relieving Brigade.

  • It must be remembered that wireless messages can be overheard by the enemy. It is necessary to send wireless messages in Playfair cipher whenever possible.  Key-word will be notified later.
  • The responsibility for enciphering, encoding, deciphering and decoding of all wireless messages rests with the Commander of the unit to whom the wireless station is allotted.
  • The Wireless personnel are trained to encipher, encode, decipher and decode messages and under the authority of the Commander of the unit or his representative but the entire responsibility rests with the Commander.
  • No message in cipher of code is to be transmitted until it has been endorsed by the Commander or his representative that the message is to be sent ”By wireless as written”.
  • For the purpose of para (g) and (h) the Officer in charge of set may be regarded as the Commander’s representative.
  • Messages will be confirmed as given in para 4 Sub-pars (g).


  • Runners will wear a RED band sewn on left sleeve below the elbow. They will carry despatches in the right left **** breast pocket, and this pocket will be kept empty of all other papers while the runner is carrying a despatch.  All ranks should be told that despatches are carried in this pocket and that if any man sees a runner killed or wounded it is his duty to search the pocket and himself to deliver the despatch found therein.  Runners should be distributed as follows:-

TWO with each Platoon Commander.

FOUR at each Company H.Q.

EIGHT at each Battalion H.Q.

FOUR from each Battalion, ONE from 42nd Machine Gun Company, and ONE from 42nd Trench Mortar Battery at Advanced Brigade H.Q. at G.34.b.95.70 to report at Signal Office at 3 pm. On ’Y’ Day each with one days rations.

Runners form a branch of the Signals of a unit.  Trained Signallers should not be employed as runners.

  • Brigade Runners will be worked on the relay system and posts of 4 men each will be established at:-
    1. Brigade Command Post M.5.d.60.90.
    2. junction of TELEGRAPH LANE and CORDITE TRENCH.

The Battery Position at M.6.d.40.30. will be Runner Post No 3.  Runners will proceed to take up position there about 2 hours and 30 minutes after ZERO.  At this Post 8 men will be stationed, 4 working to Right Battalion H.Q. and 4 to Left Battalion H.Q.  This Post will be responsible also for delivering to the 5th Shrops L.I. at the second objective.


  • Contact Aeroplanes working with the 14th Division will have a special marking, a broad black band under the lower starboard (right) plane, with streamer.
  • Flares will be lit by the most advanced troops when the Contact Aeroplane calls for them. Flares can be seen if lit at the bottom of trenches or shell holes.  The Signal for ”LIGHT FLARES” is a series of ”A”s on a Klaxon Horn or the firing of a white light.
  • Messages will be signalled to the aeroplane by means of a French Lamp or ground signal panel which should be at least 15 yards away from the ground signal sheet (the semi-circular sheet indicating the position of Battalion H.Q.) and the ground signal strips (indicating code letter of Battalion H.Q.). Messages will be signalled to aeroplanes only when all other means of communication fail.
  • Q. will indicate that they have a message for the aeroplane by calling up in the usual way.

When the aeroplane is ready to receive the message it will send the Battalion call letters and ”G” by Klaxon or Lamp.

Each word or code letter of a message from the ground will be answered by the aeroplane by the general answer ”T” and the receipt of the message will be acknowledged after V.E. by the code call of the sender followed by ”R.D.” This will be answered from the ground by ”T”.

  • Should ground signal strips not be available the Battalion code call will be sent continually until the aeroplane replies by sending code call followed by ”G”.
  • Messages sent on the panel must be confined to code given below and co-ordinates.
  • When the observer has obtained information either from the flares, ground sheet or panel, he goes to the “dropping station” at BERNEVILLE, drops the message and at once return to the Battalion for further work. The message is telegraphed from the “dropping station” to the addressee.
  • Code letters allotted are as follows:-

Brigade H.Q.              Z.D.B.

5th Oxf & Bucks L.I.   O.L.I.

5th Shrops L.I.             K.L.I.

9th K.R.Rif.C.             K.R.I.

9th Rif Bde                  R.B.I.

  • Signals between aeroplanes and Infantry are as follows:-

The rest of the paper is missing.


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