The alarm which this untoward happening created on our side of the line led to a determination to redouble our precautions. The Army Commander proposed, and I agreed, that the relief of the 13th Brigade by Canadians, prior to the eve of the battle, was out of the question, as being too risky. It was decided that the 13th Brigade must remain in the line until the very last.

This decision deprived General Maclagan of one of his three Brigades, and as it would be asking too much of the Fourth Division to carry out the rôle which had been allotted to it in the battle, with only two Brigades, I decided that the only thing to be done was to transfer to the Fourth Division, temporarily, one of the Brigades of the First Division, which was to arrive from the north in the course of the next three days.

Urgent telegrams were therefore despatched to accelerate the arrival of one of the Brigades of the First Division. In due course the First Australian Brigade (Mackay) arrived by four special trains on the night of August 6th, in sufficient time to enable it to take its place in General Maclagan's order of battle, in substitution for the 13th Brigade. The 13th Brigade was destined to have some further stirring adventures before it again joined its own Division.

The day preceding the great battle arrived all too soon. The prospect of an advance had sent a thrill through all ranks and expectation became tense. The use of the telephone had been ordered to be restricted, especially in the forward areas; for it was known that the enemy was in possession of listening apparatus, similar to our own, by which conversations on the telephone could be tapped, and unguarded references to the impending operations could be overheard.

Final inspections had, therefore, to be made, and final injunctions administered, by Commanders and Staffs traversing long distances over the extensive Corps area by motor car and horse, and even on foot. A strange and ominous quiet pervaded the scene; it was only when the explosion of a stray enemy shell would cause hundreds of heads to peer out from trenches, gun-pits and underground shelters, that one became aware that the whole country was really packed thick with a teeming population carefully hidden away.

Later in the afternoon of that last day came another note of alarm. To the Fourth and Fifth Australian Divisions had been allotted eighteen Store and Carrying Tanks. These had been brought the night before, into a small plantation lying about half a mile to the north of Villers-Bretonneux, loaded to their utmost capacity with battle stores of all descriptions: reserves of food and water, rifle ammunition, and a large reserve of Stokes Mortar bombs; also considerable supplies of petrol, to satisfy the ravenous appetites of the Tanks themselves.

This locality suddenly became the object of the closest attention by the enemy's Artillery. He began to deluge it with such a volume of fire that in less than half an hour a great conflagration had been started, which did not subside until fifteen of the Tanks and all their valuable cargo had been reduced to irretrievable ruin.

Had some unusually keen enemy observer perceived the presence of Tanks in our area, and would that knowledge have disclosed to him our jealously guarded secret? Fortunately, my Artillery Commander, Brigadier-General Coxen, making his last rounds of the Battery positions, was an eye-witness of the whole occurrence, and was able to reassure me. A chance shell—the last of a dozen fired entirely at random into our area—fell into the very centre of this group of Tanks, and set fire to some of the petrol. The resulting cloud of smoke became a signal to the enemy that something was burning which our men would probably attempt to salve; and in consonance with an entirely correct Artillery procedure, he at once concentrated a heavy fire upon the spot.

That incident is typical of the perturbations through which all responsible Commanders have to pass on such occasions. The occurrence was explained as accidental, and implied no premature discovery by the enemy. Nothing remained but to repair the damage, and make special arrangements to replenish the Stores which these Divisions had lost.