Glaucus | Page 7

and making them rise to the fly, by strange electric influences, at one hour rather than at another. Many a good geognostic lesson, too, both as to the nature of a country's rocks, and as to the laws by which strata are deposited, may an observing man learn as he wades up the bed of a trout- stream; not to mention the strange forms and habits of the tribes of water-insects. Moreover, no good fisherman but knows, to his sorrow, that there are plenty of minutes, ay, hours, in each day's fishing in which he would be right glad of any employment better than trying to
"Call spirits from the vasty deep,"
who will not
"Come when you do call for them."
What to do, then? You are sitting, perhaps, in your coracle, upon some mountain tarn, waiting for a wind, and waiting in vain.
"Keine luft an keine seite, Todes-stille frchterlich;"
as G��the has it -
"Und der schiffer sieht bekmmert Glatte fl?che rings umher."
You paddle to the shore on the side whence the wind ought to come, if it had any spirit in it; tie the coracle to a stone, light your cigar, lie down on your back upon the grass, grumble, and finally fall asleep. In the meanwhile, probably, the breeze has come on, and there has been half-an-hour's lively fishing curl; and you wake just in time to see the last ripple of it sneaking off at the other side of the lake, leaving all as dead-calm as before.
Now how much better, instead of falling asleep, to have walked quietly round the lake side, and asked of your own brains and of Nature the question, "How did this lake come here? What does it mean?"
It is a hole in the earth. True, but how was the hole made? There must have been huge forces at work to form such a chasm. Probably the mountain was actually opened from within by an earthquake; and when the strata fell together again, the portion at either end of the chasm, being perhaps crushed together with greater force, remained higher than the centre, and so the water lodged between them. Perhaps it was formed thus. You will at least agree that its formation must have been a grand sight enough, and one during which a spectator would have had some difficulty in keeping his footing.
And when you learn that this convulsion probably took plus at the bottom of an ocean hundreds of thousands of years ago, you have at least a few thoughts over which to ruminate, which will make you at once too busy to grumble, and ashamed to grumble.
Yet, after all, I hardly think the lake was formed in this way, and suspect that it may have been dry for ages after it emerged from the primeval waves, and Snowdonia was a palm-fringed island in a tropic sea. Let us look the place over more fully.
You see the lake is nearly circular; on the side where we stand the pebbly beach is not six feet above the water, and slopes away steeply into the valley behind us, while before us it shelves gradually into the lake; forty yards out, as you know, there is not ten feet water; and then a steep bank, the edge whereof we and the big trout know well, sinks suddenly to unknown depths. On the opposite side, that flat-topped wall of rock towers up shoreless into the sky, seven hundred feet perpendicular; the deepest water of all we know is at its very foot. Right and left, two shoulders of down slope into the lake. Now turn round and look down the gorge. Remark that this pebble bank on which we stand reaches some fifty yards downward: you see the loose stones peeping out everywhere. We may fairly suppose that we stand on a dam of loose stones, a hundred feet deep.
But why loose stones? - and if so, what matter? and what wonder? There are rocks cropping out everywhere down the hill-side.
Because if you will take up one of these stones and crack it across, you will see that it is not of the same stuff as those said rocks. Step into the next field and see. That rock is the common Snowdon slate, which we see everywhere. The two shoulders of down, right and left, are slate, too; you can see that at a glance. But the stones of the pebble bank are a close-grained, yellow-spotted rock. They are Syenite; and (you may believe me or not, as you will) they were once upon a time in the condition of a hasty pudding heated to some 800 degrees of Fahrenheit, and in that condition shoved their way up somewhere or other through these slates. But where? whence on earth did these Syenite pebbles come? Let us walk round