The Subaltern chuckled, and grinned wickedly. Swiftly he dropped the revolver, fumbled a moment, and pulled a coil of capped fuse from his pocket.

'It is the English,' he said. 'It is an English mine that I now explode,' and, on the word, lit the fuse and flung it, fizzing and spitting a jet of sparks and smoke, towards the boy. The lad flinched back and half turned to run, but the Subaltern saw him look round over his shoulder and twist back, saw the eyes glaring at the fiery thing in the mud, the dreadful resolve grow swiftly on the set young face, the teeth clamped on the resolve. He was going to dash for the fuse, to try to wrench it out and, as he supposed, prevent the mine exploding. The Subaltern jerked up the revolver again. This would never do; the precious seconds were flying; at any moment another man might come. He would have saved this youngster if he could, but he could allow nothing to risk failure for his mine. 'Get back,' he said sharply. 'Get back quickly, or I shall shoot.'

But now what he had feared happened. A voice called, a scuffling footfall sounded in the German gallery, a dim figure pushed forward into the light beside the boy. The Subaltern saw that it was an officer, heard his angry oath in answer to the boy's quick words, his shout, 'The light, fool—break it'; saw the clenched fist's vicious buffet in the boyish face and the quick grab at the electric bulb. The Subaltern's revolver sights slid off the boy and hung an instant on the snarling face of the officer. . . .

In the confined space the roar of his heavy revolver rolled and thundered in reverberating echoes, the swirling powder-reek blinded him and stung in his nostrils; and as the smoke cleared he could see the boy scrambling back along his gallery and the officer sprawled face down across the earth-heap in the light of the fallen lamp.

The Subaltern smashed the lamp himself before he too turned and plunged, floundering and slipping and stumbling, for his exit in an agony of haste and apprehension. It was all right, he told himself a dozen times; the officer was done for—the back of that head and a past knowledge of a service revolver's work at close range told him that plain enough; it would take a good many minutes for the boy to tell his tale, and even then, if a party ventured back at once, it would take many more minutes in the dark—and he was glad he thought to smash the lamp—before they could find his charges or the wires. It was safe enough, but—the tunnel had never seemed so long or the going so slow. He banged against beams and supports, ploughed through sticky mud and churning water, rasped his knuckles, and bruised knees and elbows in his mad haste. It was safe enough, but—but—but—suppose there was no response to his pressure on the switch; suppose there had been some silly mistake in making the connections; suppose the battery wouldn't work. There were a score of things to go wrong. Thank goodness he had overhauled and examined everything himself; although that again would only make it more appallingly awful if things didn't work. No time now, no chance to go back and put things right. Perhaps he ought to have stayed back there and made the contact. A quick end if it worked right, and a last chance to refix it if it didn't; yes, he . . . but here was the light ahead. He shouted 'Fire!' at the top of his voice, still hurrying on and half cowering from the expected roar and shock of the explosion. Nothing happened. He shouted again and again as loud as his sobbing breath and labouring lungs would let him. Still—nothing; and it began to sear his brain as a dreadful certainty that he had failed, that his mine was a ghastly frost, that all the labour gone to its making and the good lives spent on it were wasted. He stumbled weakly out into the shaft, caught a glimpse of the Corporal's set face staring at the tunnel mouth, and tried once more to call out 'Fire!' But the Corporal was waiting for no word. He had already got that, had heard the Subaltern's first shouts roll down the tunnel, in fact was waiting with a finger on the exploding switch for the moment the Subaltern should appear. The finger moved steadily over as the Subaltern stumbled into sight—and the solid earth heaved convulsively, shuddered, and rocked and shook to the roaring blast of the explosion.

The shock and the rush of air from the tunnel-mouth caught the Subaltern, staggering to his knees, and flung him headlong. And as he picked himself up again the air darkened with whizzing clods and mud and dust and stones and dirt that rained down from the sky. Before the echoes of the explosion had died away, before the last fragments and debris had fallen, there came the sound of another roar, the bellowing thunder of the British guns throwing a storm of shell and shrapnel between the German supports and the ruined trench. That, and another sound, told the Subaltern that the full fruits of his work were to be fully reaped—the sound of the guns and of the full, deep-chested, roaring cheers of the British infantry as they swarmed from their trenches and rushed to occupy the crater of the explosion.

* * * * *

Later in the day, when the infantry had made good their possession of the place, had sandbagged and fortified it to stand against the expected counter-attacks, the Subaltern went to look over the ground and see at first and close hand the results of his explosion. Technically, he found it interesting; humanly, it was merely sickening. The ground was one weltering chaos and confusion of tossed earth-heaps and holes, of broken beams and jagged-ended planks, of flung sandbags and wrecked barricading. Of trench or barricade, as trench and barricade, there remained, simply, no sign. The wreckage was scattered thick with a dreadful debris of dead bodies, of bloody clothing, of helmets and broken rifles, burst packs and haversacks, bayonets, water-bottles, and shattered equipments. The Ambulance men were busy, but there were still many dead and dying and wounded to be removed, wounded with torn flesh and mangled limbs, dead and dying with scorched and smouldering clothes. The infantry, hastily digging and filling sandbags and throwing up parapets on the far edge of the reeking explosion pit, had found many bodies caught in the descending avalanche of earth or buried in the collapsed trenches and dug-outs; and here and there, amid the confusion, a foot or a hand protruding stark from some earth-heap marked the death-place of other victims. The whole scene was one of death and desolation, of ruin and destruction, and the Subaltern turned from it sick at stomach. It was the first result of a big explosion he had seen. This was the sort of thing that he had read so often summed up in a line of the Official Despatch or a two-line newspaper paragraph: 'A mine was successfully exploded under a section of the enemy's trench.' A mine—his mine. . . . 'God!' the Subaltern said softly under his breath, and looked wonderingly about him.

''E's a bloomin' little butcher, is that Lefftenant of ours,' the Corporal said that night. ''Course it was a good bit o' work, an' he'd reason to be proud of it; but—well I thought I'd a strongish stomach, an' I've seen some dirty blood-an'-bones messes in my time but that scorchin' shambles near turned me over. An' he comes back, after lookin' at it, as cheerful as the cornerman o' a Christie Minstrel troupe, an' as pleased as a dog wi' two tails. Fair pleased, 'e was.'

But he was a little wrong. What had brought the Subaltern back with such a cheerful air was not the sight of his work, not the grim picture of the smashed trenches. It was an encounter he had had with a little group of German prisoners, the recognising amongst them of a dirty, mud-stained blue shirt with sleeves cut off above the elbows, a close-cropped bare head, a boy's face with smooth oval chin and girlish eyes. The mine work he had directed, but others had shared it. It was the day's work—it was an incident of war—it was, after all, merely 'a mine successfully exploded . . .' But that one life saved was also his work, and, moreover, his own, his individual personal work. It was of that he thought most as he came back smiling to his Corporal.