When you have been down in two or three pits you begin to get some grasp of the processes that are going on underground. (I ought to say, by the way, that I know nothing whatever about the technical side of mining: I am merely describing what I have seen.) Coal lies in thin seams between enormous layers of rock, so that essentially the process of getting it out is like scooping the central layer from a Neapolitan ice. In the old days the miners used to cut straight into the coal with pick and crowbar — a very slow job because coal, when lying in its virgin state, is almost as hard as rock. Nowadays the preliminary work is done by an electrically-driven coal-cutter, which in principle is an immensely tough and powerful band-saw, running horizontally instead of vertically, with teeth a couple of inches long and half an inch or an inch thick. It can move backwards or forwards on its own power, and the men operating it can rotate it this way or that. Incidentally it makes one of the most awful noises I have ever heard, and sends forth clouds of coal dust which make it impossible to see more than two to three feet and almost impossible to breathe. The machine travels along the coal face cutting into the base of the coal and undermining it to the depth of five feet or five feet and a half; after this it is comparatively easy to extract the coal to the depth to which it has been undermined. Where it is ‘difficult getting’, however, it has also to be loosened with explosives. A man with an electric drill, like a rather small version of the drills used in street-mending, bores holes at intervals in the coal, inserts blasting powder, plugs it with clay, goes round the corner if there is one handy (he is supposed to retire to twenty-five yards distance) and touches off the charge with an electric current. This is not intended to bring the coal out, only to loosen it. Occasionally, of course, the charge is too powerful, and then it not only brings the coal out but brings the roof down as well.
After the blasting has been done the ‘fillers’ can tumble the coal out, break it up and shovel it on to the conveyor belt. It comes out first in monstrous boulders which may weigh anything up to twenty tons. The conveyor belt shoots it on to tubs, and the tubs are shoved into the main road and hitched on to an endlessly revolving steel cable which drags them to the cage. Then they are hoisted, and at the surface the coal is sorted by being run over screens, and if necessary is washed as well. As far as possible the ‘dirt’— the shale, that is — is used for making the roads below. All what cannot be used is sent to the surface and dumped; hence the monstrous ‘dirt-heaps’, like hideous grey mountains, which are the characteristic scenery of the coal areas. When the coal has been extracted to the depth to which the machine has cut, the coal face has advanced by five feet. Fresh props are put in to hold up the newly exposed roof, and during the next shift the conveyor belt is taken to pieces, moved five feet forward and re-assembled. As far as possible the three operations of cutting, blasting and extraction are done in three separate shifts, the cutting in the afternoon, the blasting at night (there is a law, not always kept, that forbids its being done when other men are working near by), and the ‘filling’ in the morning shift, which lasts from six in the morning until half past one.
Even when you watch the process of coal-extraction you probably only watch it for a short time, and it is not until you begin making a few calculations that you realize what a stupendous task the ‘fillers’ are performing. Normally each man has to clear a space four or five yards wide. The cutter has undermined the coal to the depth of five feet, so that if the seam of coal is three or four feet high, each man has to cut out, break up and load on to the belt something between seven and twelve cubic yards of coal. This is to say, taking a cubic yard as weighing twenty-seven hundred-weight, that each man is shifting coal at a speed approaching two tons an hour. I have just enough experience of pick and shovel work to be able to grasp what this means. When I am digging trenches in my garden, if I shift two tons of earth during the afternoon, I feel that I have earned my tea. But earth is tractable stuff compared with coal, and I don’t have to work kneeling down, a thousand feet underground, in suffocating heat and swallowing coal dust with every breath I take; nor do I have to walk a mile bent double before I begin. The miner’s job would be as much beyond my power as it would be to perform on a flying trapeze or to win the Grand National. I am not a manual labourer and please God I never shall be one, but there are some kinds of manual work that I could do if I had to. At a pitch I could be a tolerable road-sweeper or an inefficient gardener or even a tenth-rate farm hand. But by no conceivable amount of effort or training could I become a coal-miner, the work would kill me in a few weeks.
Watching coal-miners at work, you realize momentarily what different universes people inhabit. Down there where coal is dug is a sort of world apart which one can quite easily go through life without ever hearing about. Probably majority of people would even prefer not to hear about it. Yet it is the absolutely necessary counterpart of our world above. Practically everything we do, from eating an ice to crossing the Atlantic, and from baking a loaf to writing a novel, involves the use of coal, directly or indirectly. For all the arts of peace coal is needed; if war breaks out it is needed all the more. In time of revolution the miner must go on working or the revolution must stop, for revolution as much as reaction needs coal. Whatever may be happening on the surface, the hacking and shovelling have got to continue without a pause, or at any rate without pausing for more than a few weeks at the most. In order that Hitler may march the goose-step, that the Pope may denounce Bolshevism, that the cricket crowds may assemble at Lords, that the poets may scratch one another’s backs, coal has got to be forthcoming. But on the whole we are not aware of it; we all know that we ‘must have coal’, but we seldom or never remember what coal-getting involves. Here am I sitting writing in front of my comfortable coal fire. It is April but I still need a fire. Once a fortnight the coal cart drives up to the door and men in leather jerkins carry the coal indoors in stout sacks smelling of tar and shoot it clanking into the coal-hole under the stairs. It is only very rarely, when I make a definite mental-effort, that I connect this coal with that far-off labour in the mines. It is just ‘coal’— something that I have got to have; black stuff that arrives mysteriously from nowhere in particular, like manna except that you have to pay for it. You could quite easily drive a car right across the north of England and never once remember that hundreds of feet below the road you are on the miners are hacking at the coal. Yet in a sense it is the miners who are driving your car forward. Their lamp-lit world down there is as necessary to the daylight world above as the root is to the flower.
It is not long since conditions in the mines were worse than they are now. There are still living a few very old women who in their youth have worked underground, with the harness round their waists, and a chain that passed between their legs, crawling on all fours and dragging tubs of coal. They used to go on doing this even when they were pregnant. And even now, if coal could not be produced without pregnant women dragging it to and fro, I fancy we should let