The brigade reserve of ammunition will follow in rear of the centre of the brigade, or as the General Officer Commanding may direct. It should be accompanied by signallers, who should maintain communication with the various regimental reserves. When a S.A.A. cart with the supports is emptied, it will be replaced by a full cart from the regimental reserve, the empty cart being sent back to the brigade reserve, when it will be replaced by a full one. As soon as there are four empty S.A.A. carts with the brigade reserve the officer in charge will send a message as follows to the officer in charge of the divisional reserve: “Send up four S.A.A. carts to the --th brigade.” It is, however, unnecessary to wait till four carts are empty, if ammunition is urgently required. On the arrival of the carts from the divisional reserve, the horses will be unhooked and changed, and empty carts sent back to the divisional reserve. In the event of a brigade in action being ordered to advance through woods or over broken ground where communication cannot be maintained, the S.A.A. carts of the brigade reserve may be distributed between battalions, and the divisional reserve would conform to the general movement. In the case of a battalion being detached to any distance a similar course would be pursued, a brigade reserve being reformed as soon as possible. 6. _Instructions for the officer in charge of the brigade reserve of ammunition._ (i) He will as soon as possible open up communication with the divisional reserve and also with the various regimental reserves. (ii) A mounted orderly will be sent to him from the divisional reserve to be used only for the purpose of communicating with the divisional reserve. He will communicate with the regimental reserves by means of signallers. (iii) The earliest opportunity is to be taken (when four S.A.A. carts are empty, or sooner if necessary) to fill up empty carts from the divisional reserve. The brigade reserve should be regarded as available for the brigade generally, and also in case of necessity it will supply ammunition to any troops engaged. (iv) Men and horses belonging to the brigade reserve are not to be sent to the divisional reserve. Men and horses belonging to the divisional reserve are not to be sent further to the front than the brigade reserve, except in a case of emergency. (v) Empty S.A.A. carts are to remain with the brigade reserve until they are replaced by full ones. (vi) Receipts prepared by the officer in charge of the divisional reserve will be signed by the officer in charge of the brigade reserve for the number of full carts received by him. (vii) After an action or during a pause in the engagement all deficiencies of ammunition must be made good from the divisional reserve.