Deep Down - Robert Michael Ballantyne (digital book reader .TXT) 📗

yonder seagull is now wheeling above the waves, wondering what new species of bird has taken possession of its native cliffs. Five minutes are passed--yet still descending rapidly! They must be half a mile out from the land now--half of a mile out on the first part of a submarine tunnel to America! "Old England is on the lee," but they are very much the reverse of afloat; solid rock is above, on either side and below--so close to them that the elbows must not be allowed to protrude over the edge of their car, nor the head be held too high. Here even royalty must stoop--not that we would be understood to imply that royalty cannot stoop elsewhere. Those who dwell in Highland cottages could contradict us if we did! Presently the rope "slows"--the lower depths are reached, and now for some time there is patient waiting, for it is understood that they are examining the "levels," where the stout men of Cornwall tear out the solid rock in quest of copper and tin.

After a time the thin snake begins to ascend; they are coming up now, but not so fast as they went down. It is about ten minutes before the gig emerges from that black hole and bears the Prince and Princess once more into the light of day.

Yes, it was a great day for Botallack, and it will dwell long in the memories of those who witnessed it--especially of that fortunate captain of the mine who had the honour of conducting the Princess on the occasion, and of whose enthusiasm in recalling the event, and in commenting on her intelligence and condescension, we can speak from personal observation.

But, reader, you will say, What has all this to do with our story?

Nothing--we admit it frankly--nothing whatever in a direct way; nevertheless, indirectly, the narrative may possibly arouse in you greater interest in the mine down which we are about to conduct you--not by the same route as that taken by the Prince and Princess (for the Boscawen Shaft did not exist at the period of our tale), but by one much more difficult and dangerous, as you shall see.

Before we go, however, permit us to add to the offence of digression, by wandering still further out of our direct road. There are a few facts regarding Botallack and mining operations, without a knowledge of which you will be apt at times to misunderstand your position.

Let us suppose that a mine has been already opened; that a "lode"--that is, a vein of quartz with metal in it--has been discovered cropping out of the earth, and that it has been dug down upon from above, and dug in upon from the sea-cliffs. A shaft has been sunk--in other words, a hole excavated--let us say, two or three hundred yards inland, to a depth of some forty or fifty fathoms,--near the sea-level. This shaft is perhaps nine feet by six wide. The lode, being a layer of quartz, sometimes slopes one way, sometimes another, and is occasionally perpendicular. It also varies in its run or direction a little here and there, like a wildish horse, being sometimes met by other lodes, which, like bad companions, divert it from the straight course. Unlike bad companions, however, they increase its value at the point of meeting by thickening it. Whatever course the lode takes, the miner conscientiously follows suit. His shaft slopes much, little, or not at all, according to the "lie of the lode."

It is an ancient truism that water must find its level. Owing to this law, much water accumulates in the shaft, obliging the miner to erect an engine-house and provide a powerful pumping-engine with all its gear, at immense cost, to keep the works dry as he proceeds. He then goes to the shore, and there, in the face of the perpendicular cliff, a little above the sea-level, he cuts a horizontal tunnel about six feet high by three broad, and continues to chisel and blast away the solid rock until he "drives" his tunnel a quarter of a mile inland, which he will do at a rate varying from two to six feet per week, according to the hardness of the rock, until he reaches the shaft and thus provides an easy and inexpensive passage for the water without pumping. This tunnel or level he calls the "Adit level." But his pumping-engine is by no means rendered useless, for it has much to do in hauling ore to the surface, etcetera. In process of time, the miner works away all the lode down to the sea-level, and must sink the shaft deeper--perhaps ten or twenty fathoms--where new levels are driven horizontally "on the lode," and water accumulates which must be pumped up to the Adit level, whence it escapes to the sea.

Thus down, down, he goes, sinking his shaft and driving his levels on-- that is, always following the lode _ad infinitum_. Of course he must stop before reaching the other side of the world! At the present time Botallack has progressed in that direction to a depth of 245 fathoms. To those who find a difficulty in realising what depth that really is, we would observe that it is equal to more than three and a half times the height of St. Paul's Cathedral in London, nearly four times the height of St. Rollox chimney in Glasgow, and considerably more than twice the height, from the plain, of Arthur's Seat, near Edinburgh.

When the levels have been driven a considerable distance from the shaft, the air naturally becomes bad from want of circulation. To remedy this evil, holes, or short shafts, called "winzes," are sunk at intervals from the upper to the lower levels. These winzes are dangerous traps for the unwary or careless, extending frequently to a depth of ten or fifteen fathoms, and being bridged across by one or two loose planks. Ladders are fixed in many of them to facilitate progress through the mine. When a miner drives the end of his level so far that the air will not circulate, a new winze is usually sunk down to him from the level above. The circulation is thus extended, and the levels progress further and further right and left until they occupy miles of ground. The levels and shafts of Botallack, if put together, would extend to not less than forty miles, and the superficial space of ground, on and beneath which the mine lies, is above 260 acres.

When the lode is rich, and extends upwards or downwards, it is cut away from between levels, in a regular systematic manner, strong beams being placed to support temporary platforms, on which the miners may stand and work as they ascend. When they have cut all the lode away up to the level above them, a false timber bottom is made to replace the rocky bottom of the level which is being removed. Thus, in traversing the old workings of a mine one suddenly comes to great caverns, very narrow, but of such immense height above and depth below that the rays of your candle cannot penetrate the darkness. In such places the thick short beams that were used by the old miners are seen extending from side to side of the empty space, disappearing in dim perspective. Woe betide the man who stumbles off his narrow plank, or sets his foot on an insecure beam in such places! Where such workings are in progress, the positions of the miners appear singularly wild and insecure. The men stand in the narrow chasm between the granite walls above each others' heads, slight temporary platforms alone preserving them from certain death, and the candles of those highest above you twinkling like stars in a black sky.

In these underground regions of Botallack, above three hundred men and boys are employed, some of whom work occasionally by night as well as by day. On the surface about two hundred men, women, and boys are employed "dressing" the ore, etcetera.

Other mines there are in the great mining centres of Cornwall--Redruth, St. Just, St. Austell, and Helston, which are well worthy of note--some of them a little deeper, and some richer than Botallack. But we profess not to treat of all the Cornish mines; our object is to describe one as a type of many, if not all, and as this one runs farthest out beneath the sea, is deeper than most of the others, and richer than many, besides having interesting associations, and being of venerable antiquity, we hold it to be the one most worthy of selection.

With a few briefly stated facts we shall take final leave of statistics.

As we have said, the Boscawen shaft measures 245 fathoms. The ladder-way by which the men ascend and descend daily extends to 205 fathoms. It takes a man half an hour to reach the bottom, and fully an hour to climb to the surface. There are three pumping and seven winding engines at work--the largest being of 70 horse-power. The tin raised is from 33 to 35 tons a month. The price of tin has varied from 55 pounds to 90 pounds per ton. In time past, when Botallack was more of a copper than a tin-mine, a fathom has been known to yield 100 pounds worth of ore, and a miner has sometimes broken out as much as 300 pounds worth in one month.

The mine has been worked from time immemorial. It is known to have been wrought a hundred years before it was taken by the present company, who have had it between thirty and forty years, and, under the able direction of the present manager and purser, Mr Stephen Harvey James, it has paid the shareholders more than 100,000 pounds. The profit in the year 1844 was 24,000 pounds. At the termination of one period of working it left a profit of 300,000 pounds. It has experienced many vicissitudes of fortune. Formerly it was worked for tin, and at one period (1841) was doing so badly that it was about to be abandoned, when an unlooked for discovery of copper was made, and a period of great prosperity again set in, during which many shareholders and miners made their fortunes out of Botallack.

Thus much, with a humble apology, we present to the reader, and now resume the thread of our narrative.

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Note 1. The packmen are so styled because of their visits being paid fortnightly.


CHAPTER EIGHT.


DOWN, DOWN, DOWN.

Before descending the mine Captain Dan led Oliver to the counting-house, where he bade him undress and put on miner's clothing.

"I'll need a biggish suit," observed Oliver.

"True," said Captain Dan; "we are obliged usually to give visitors our smallest suits. You are an exception to the rule. Indeed, I'm not sure that I have a pair of trousers big enough for--ah yes, by the way, here is a pair belonging to one of our captains who is unusually stout and tall; I dare say you'll be able to squeeze into 'em."

"All right," said Oliver, laughing, as he pulled on the red garments; "they are wide enough round the waist, at all events. Now for a hat."

"There," said the captain, handing him a white cotton skull-cap, "put that on."

"Why, what's this for?" said Oliver.

"To keep _that_ from dirtying your head," replied the other, as he handed his companion