Thus did Jim Denver come back to his regiment. Once again the life of the moles claimed him—the life of the underworld: that strange existence of which so much has been written, and so little has been really grasped by those who have not been there. A life of incredible dreariness—yet possessing a certain "grip" of its own. A life of peculiar contrasts—where the suddenness—the abruptness of things strikes a man forcibly: the extraordinary contrasts of black and white. Sometimes they stand out stark and menacing, gleaming and brilliant; more often do they merge into grey. But always are they there....

As I said before, my object is not to give a diary of my hero's life. I am not concerned with his daily vegetation in his particular hole, with Hooge on his right front and a battered farm close to. Sleep, eat, read, look through a periscope and then repeat the performance. Occasionally an aerial torpedo, frequently bombs, at all times pessimistic sappers desiring working parties. But it was very much the "grey" of trench life during the three days that Jim sat in the front line by the wood that is called "Railway."

One episode is perhaps worthy of note. It was just one of those harmless little jests which give one an appetite for a hunk of bully washed down by a glass of tepid whisky and water. Now be it known to those who do not dabble in explosives, there are in the army two types of fuze which are used for firing charges. Each type is flexible, and about the thickness of a stout and well-nourished worm. Each, moreover, consists of an inner core which burns, protected by an outer covering—the idea being that on lighting one end a flame should pass along the burning inner core and explode in due course whatever is at the other end. There, however, their similarity ends; and their difference becomes so marked that the kindly powers that be have taken great precautions against the two being confused.

The first of these fuzes is called Safety—and the outer covering is black. In this type the inner core burns quite slowly at the rate of two or three feet to the minute. This is the fuze which is used in the preparation of the jam-tin bomb: an instrument of destruction which has caused much amusement to the frivolous. A jam tin is taken and is filled with gun cotton, nails, and scraps of iron. Into the gun cotton is inserted a detonator; and into the detonator is inserted two inches of safety-fuze. The end of the safety-fuze is then lit, and the jam tin is presented to the Hun. It will readily be seen by those who are profound mathematicians, that if three feet of safety-fuze burn in a minute, two inches will burn in about three seconds—and three seconds is just long enough for the presentation ceremony. This in fact is the principal of all bombs both great and small.

The second of these fuzes is called Instantaneous—and the outer covering is orange. In this type the inner core burns quite quickly, at the rate of some thirty yards to the second, or eighteen hundred times as fast as the first. Should, therefore, an unwary person place two inches of this second fuze in his jam tin by mistake, and light it, it will take exactly one-600th of a second before he gets to the motto. Which is "movement with a meaning quite its own."

To Jim then came an idea. Why not with care and great cunning remove from the inner core of Instantaneous fuze its vulgar orange covering, and substitute instead a garb of sober black—and thus disguised present several bombs of great potency unlighted to the Hun.

The afternoon before they left for the reserve trenches he staged his comedy in one act and an epilogue. A shower of bombs was propelled in the direction of the opposing cave-dwellers to the accompaniment of loud cries, cat calls, and other strange noises. The true artist never exaggerates, and quite half the bombs had genuine safety-fuze in them and were lit before being thrown. The remainder were not lit, it is perhaps superfluous to add.

The lazy peace of the afternoon was rudely shattered for the Huns. Quite a number of genuine bombs had exploded dangerously near their trench—while some had even taken effect in the trench. Then they perceived several unlit ones lying about—evidently propelled by nervous men who had got rid of them before lighting them properly. And there was much laughter in that German trench as they decided to give the epilogue by lighting them and throwing them back. Shortly after a series of explosions, followed by howls and groans, announced the carrying out of that decision. And once again the Hymn of Hate came faintly through the drowsy stillness....

Those are the little things which occasionally paint the grey with a dab of white; the prowls at night—the joys of the sniper who has just bagged a winner and won the bag of nuts—all help to keep the spirits up when the pattern of earth in your particular hole causes a rush of blood to the head.

Incidentally this little comedy was destined to be Jim Denver's last experience of the Hun at close quarters for many weeks to come. The grey settled down like a pall, to lift in the fulness of time, to the black and white day of his life. But for the present—peace. And yet only peace as far as he was concerned personally. That very night, close to him so that he saw it all, some other battalions had a chequered hour or so—which is all in the luck of the game. To-day it's the man over the road—to-morrow it's you....