They were hunted down remorselessly, and not one of them escaped. Those who were not killed outright were taken prisoners.

It was very fine while it lasted, and the men would have given anything to go on. But Colonel Conway knew the risk too well, and as soon as they had gained the summit of the cliff whistle signals from the sergeants stopped them, and the order came to dig themselves in with all speed.

It is one thing to occupy a trench already made, quite another to dig one under fire. There is no question of standing up and wielding the shovel as if one were digging a garden. Men must lie down and scratch and scrape until they get head cover, then gradually open up a narrow ditch into which they sink slowly.

'I didn't enlist as a blooming navvy,' grunted Roy Horan, who had stuck by Ken and Dave. 'Phew, but it's hot as a North Island beach on Christmas Day!'

As he spoke came an earth-shaking thud, and Ken, who was next to Roy, grabbed him by the collar and pulled him down flat on the ground.

Just in time, too, for next instant the earth three yards away in front burst upwards in a fountain of stones and pieces of broken steel. Ken felt a blast of heat and stinging sand across the back of his neck, while the concussion made his head ring.

'What the blazes?' muttered Roy, as he lifted his head and looked round dazedly.

'It was blazes all right,' answered Ken dryly. 'A high explosive shell, my lad. Lucky that it went pretty deep before it burst.'

'And lucky for me that you pulled my head down in time,' answered Roy soberly. 'Thanks, old man. I shan't forget that.'

The next shell burst behind the line, and the third still farther back. Fortunately for the Australians, the German gunners had not got the exact range, or the losses would have been fearful. High explosive of the kind the Germans use will pulverise the parapet of a trench and kill every one within reach.