He was right, too. The crumbling soil was one little difficulty promptly and easily met. The next was more troublesome. The soil grew wetter and more wet until at last the men were working ankle deep in water. The further the mine went the wetter it became. The men worked on, taking their turn at the narrow face, shovelling out the wet muck and dragging it back to the shaft and up and out and away by the communication trench. They squeezed aside in silence when the Subaltern pushed in to inspect the working, and waited with side winks to one another to see what he would do to overcome the water difficulty. 'Pumps' would of course have been the simple answer, but the men knew as well as the Subaltern knew that pumps were not to be had at that particular time and place for love or money, and that all the filling of all the 'indents' in the R.E. would not produce one single efficient pump from store.

The Subaltern did not trouble with indent forms or stores. He had had something of a fight to get a grudging permission for his mine, and he felt it in his bones that if he worried the big chiefs too much with requisitions he would be told to abandon the mine. He shut his teeth tight at the thought. It was his mine and he was going to see it through, if he had to bale the water out with a tea-cup.

He made a quick cast through the shell-wrecked village, drew blank, sat for fifteen minutes on the curb of a rubble-choked well and thought hard, jumped up and called the Corporal to provide him with four men and some odd tools, and struck back across muddy and shell-cratered fields to the nearest farm. The farmer, who had remained in possession despite the daily proximity of bursting shells, a shrapnel-smashed tile roof, and a gaping hole where one house-corner should have been, made some objection to the commandeering of his old-fashioned farm pump. He was at first supported in this by the officer in charge of the men billeted in the barn and sheds, but the Sapper explained the urgency of his need and cunningly clinched the argument by reminding the Infantry officer that probably he and his men would soon be installed in the trenches from which the mine ran, and that he—the Sapper—although he was not supposed to mention it, might just hint that his mine was only hurrying to forestall an enemy mine which was judged to be approaching the trench the Infantry officer would presently occupy. This last was a sheer invention of the moment, but it served excellently, and the Sapper and his party bore off their pump in triumph. It was later erected in the mine shaft, and the difficulty of providing sufficient piping to run from the pump to the waterlogged part of the mine was met by a midnight visit to the house where Headquarters abode and the wholesale removal of gutters and rain-pipes. As Headquarters had its principal residence in a commodious and cobwebby cellar, the absence of the gutters fortunately passed without remark, and the sentry who watched the looting and the sergeant to whom he reported it were quite satisfied by the presence of an Engineer officer and his calm assurance that it was 'all right—orders—an Engineers' job.'

The pump did its work excellently, and a steady stream of muddy water gushed from its nozzle and flowed down the Headquarters gutter-pipes to a selected spot well behind the trenches. Unfortunately the pump, being old-fashioned, was somewhat noisy, and all the packing and oiling and tinkering failed to silence its clank-clink, clank-clink, as its arm rose and fell.

The nearest German trench caught the clank-clink, and by a simple process of deduction and elimination arrived at its meaning and its location. The pump and the pumpers led a troubled life after that. Snipers kept an unsteady but never silent series of bullets smacking into the stones of the ruin, whistling over the communication trench, and 'whupp'-ing into the mud around both. A light gun took a hand and plumped a number of rounds each day into the crumbling walls and rubbish-heaps of stone and brick, and burst shrapnel all over the lot. The Sappers dodged the snipers by keeping tight and close to cover; they frustrated the direct-hitting 'Fizz-Bang' shells by a stout barricade of many thicknesses of sandbags bolstering up the fragment of wall that hid their shaft and pump, and finally they erected a low roof over the works and sandbagged that secure against the shrapnel. There were casualties of course, but these are always in the way of business with the Sappers and came as a matter of course. The Germans brought up a trench-mortar next and flung noisy and nerve-wrecking high-explosive bombs into and all round the ruin, bursting down all the remaining walls except the sandbagged one and scoring a few more casualties until the forward trench installed a trench-mortar of their own, and by a generous return of two bombs to the enemy's one put the German out of action. A big minnenwerfer came into play next, and because it could throw a murderous-sized bomb from far behind the German trench it was too much for the British trench-mortar to tackle. This brought the gunners into the game, and the harassed infantry (who were coming to look on the Sapper Subaltern and his works as an unmitigated nuisance and a most undesirable acquaintance who drew more than a fair share of enemy fire on them) appealed to the guns to rid them of their latest tormentor. An Artillery Observing Officer spent a perilous hour or two amongst the shrapnel and snipers' bullets on top of the sandbagged wall, until he had located the minnenwerfer. Then about two minutes' telephoned talk to the Battery and ten minutes of spouting lyddite volcanoes finished the minnenwerfer trouble. But all this above-ground work was by way of an aside to the Sapper Subaltern. He was far too busy with his mine gallery to worry about the doings of gunners and bomb-throwers and infantry and such-like fellows. When these people interfered with his work they were a nuisance of course, but he always managed to find a working party for the sandbagging protective work without stopping the job underground.

So the gallery crept steadily on. They had to carry the tunnel rather close to the surface because at very little depth they struck more water than any pumps, much less their single farmyard one, could cope with. The nearness to the surface made a fresh difficulty and necessitated the greatest care in working under the ground between the trenches, because here there were always deep shell-holes and craters to be avoided or floored with the planking that made the tunnel roof. So the gallery had to be driven carefully at a level below the danger of exposure through a shell-hole and above the depth at which the water lay. This meant a tunnel too low to stand or even kneel in with a straight back, and the men, kneeling in mud, crouched back on their heels and with rounded back and shoulders, struck their spades forward into the face and dragged the earth out spadeful by spadeful. Despite the numbing cold mud they knelt in, the men, stripped to shirts with rolled sleeves and open throats, streamed rivulets of sweat as they worked; for the air was close and thick and heavy, and the exertion in the cramped space was one long muscle-racking strain.

Once the roof and walls caved in, and three men were imprisoned. The collapse came during the night, fortunately, and, still more fortunately behind the line and parapet of the forward trench. The Subaltern flung himself and his men on the muddy wreckage in frantic haste to clear an opening and admit air to the imprisoned men. It took time, a heart-breaking length of time; and it was with a horrible dread in his heart that the Subaltern at last pushed in to the uncovered opening and crawled along the tunnel, flashing his electric torch before him. Half-way to the end he felt a draught of cold air, and, promptly extinguishing his lamp, saw a hole in the roof. His men were alive all right, and not only alive but keeping on hard at work at the end of the tunnel. When the collapse came they had gone back to where their roof lay across the bottom of a shell-hole, pulled a plank out, and—gone back to work.

When the tunnel reached a point under the German parapet it was turned sharp to left and right, forming a capital T with the cross-piece running roughly along the line of trench and parapet. Here there was need of the utmost deliberation and caution. A pick could not be used, and even a spade had to be handled gently, in case the sounds of working should reach the Germans overhead. In some places the Subaltern could actually hear the movements and footsteps of the enemy just above him.

Twice the diggers disturbed a dead German, buried evidently under the parapet. Once a significant crumbling of the earth and fall of a few heavy clods threatened a collapse where the gallery was under the edge of the trench. The spot was hastily but securely shored up with infinite caution and the least possible sound, and after that the Subaltern had the explosive charges brought along and connected up in readiness. Then, if the roof collapsed or their work were discovered, the switch at the shaft could still be pressed, the wires would still carry the current, and the mine would be exploded.

At last the Subaltern decided that everything was ready. He carefully placed his charges, connected up his wires again, cleared out his tools, and emerged to report 'all ready.'