On the heels of the infantry the tanks arrived on the following day at Caix, ten miles from their starting-point, and disgorged. Two of them made a round of the more advanced machine-gun posts, and, despite heated protests from the enemy, supplied much-needed ammunition, returning in triumph.

Some of the men found it difficult to remember that, strictly speaking, Carrier companies were not "fighting troops." Wallace, for instance, a runner, finding the time heavy on his hands, disappeared for a few hours, when he was not required, and joined the Canadians in a successful little bombing raid.

The section returned by night. The enemy aeroplanes, attracted presumably by the glow of their exhaust-pipes, bombed them unmercifully, but without success.

After a series of marches and counter-marches, inspired by false alarms, Ritchie's section returned to Querrieu Wood on the 18th. I had intended to give him a week to rest his men and overhaul his tanks, which had already covered a hundred miles without respite, but I received orders to assist the 47th Division in an attack north of the Somme, and my remaining sections had already been ear-marked for the 1st Australian and 32nd Divisions.

So on the 21st Ritchie's weary old tanks trekked six miles over difficult country to Bonnay, a pleasant little village on the Ancre, a mile above the confluence of the Ancre and the Somme. It was a hurried business: I fetched the necessary maps in my car from brigade headquarters. Two of the tanks loaded up immediately with machine-gun ammunition, and, trekking another four miles, about midnight came to a brickyard just behind our trenches. North of the Somme the enemy was fighting stubbornly, and his guns pounded away day and night. The neighbourhood of the brickyard was shelled and gassed until the crew longed for the battle.

At dawn the two tanks under Jacobs crawled forward into the gas and smoke, and, passing through the enemy barrage, dumped their loads of machine-gun ammunition among the advanced posts and returned with the crews slightly gassed but otherwise unharmed.

Two of the remaining tanks went forward with infantry supplies late in the morning when the struggle was swaying to and fro over the Happy Valley, a couple of miles south of our old camp at Meaulte. There was never a more deadly struggle, and the issue was always in doubt.

The first tank was led by Sergeant Bell. He came to the place where he should have unloaded his stores. The Germans were pressing fiercely, and the tank was in the forefront of the battle. Under bitter shell-fire and machine-gun fire Bell endeavoured to unload at least his precious ammunition, but two of his crew were killed and one man was seriously wounded immediately after they had left the shelter of the tank. Bell collected another party of infantrymen, but by this time the Germans were close to the tank, and our infantry, who had lost heavily, were withdrawing. Bell could do nothing, for a Carrier tank possesses only one Hotchkiss gun to fire ahead, and, as his tank had turned to provide cover for the unloading party, that gun would not bear. He was unable to move the tank, because by this time every man of his crew had been killed or wounded. He waited helplessly until the Germans had almost surrounded the tank, and then, firing one last burst from a Lewis gun which he had secured, he ran across to a trench in which our infantry had rallied. The tank stayed in No-Man's-Land. Twice during the day Bell, with two of my men, tried to crawl out to it and drive it in, but the German machine-guns were too vicious.[30]

The second tank was led by Holt. He had just climbed inside for a moment, when a shell pierced the sponson and burst, killing instantly Holt and one of his men and wounding the remainder.[31] We could recover nothing at the time, although Wallace made a brave attempt; the Germans had regained too much ground, and to approach the tank was certain death.

It was a disastrous day. The attack had failed and the failure had been costly. The Happy Valley was strewn with derelict tanks, and the cemetery on the Meaulte road is very full.