The Last Barrier

I

IN a circular hollow in the clean, bright gravel of the river-bar the tiny egg of the great Quahdavic salmon stirred to life. For months it had lain there among its thousands of fellows, with the clear, cold, unsullied current streaming over it ceaselessly. Through the autumn the wilderness sunshine and the bracing wilderness air, playing on the unshaded shallows of the wide stream, had kept the water highly vitalized, – though this was hardly necessary in that pure and spring-fed current. When the savage northern winter closed down upon the high valley of the Quahdavic it found difficulty in freezing the swift current that ran rippling over the bar; and when, at last, the frost conquered, gripping and clutching through the long, windless nights, it was to form only a thin armour of transparent, steel-strong ice, through which, as through the mantle of snow which made haste to cover it, the light still filtered softly but radiantly at noon, with an ethereal cobalt tinge.

The bar on which the parent salmon had hollowed their round gravel nest was far up the Great South Branch of the Quahdavic, not many miles from the little cold spring lake that was its source. The Great South Branch was a stream much loved by the salmon, for its deep pools, its fine gravel spawning-beds, the purity and steady coldness of its current, and the remoteness which protected it from the visits of greedy poachers. In all its course there was but one serious obstruction, namely, the Big Falls, where the stream fell about twelve feet in one pitch, then roared down for half a mile over a succession of low ledges with deep pools between. The Falls were such that vigorous fish had no real trouble in surmounting them. But they inexorably weeded out the weaklings. No feeble salmon ever got to the top of that straight and thunderous pitch. Therefore, as the spawning-bars were all above the Falls, it was a fine, long-finned, clean swimming breed of salmon that was bred in the Great South Branch.

When the tiny egg in the gravel stirred to life, – as the thousands of other tiny eggs about it were doing at the same time, – there was no ice sheet imprisoning the current, which ran singing pleasantly under a soft spring sun. The deep hollow in the gravel sheltered the moving atoms, so that they were not swept away by the current streaming over them. But minute as they were, they speedily gathered a strength altogether miraculous for their size, as they absorbed the clinging sacs of egg-substance and assumed the forms of fish, almost microscopic, but perfect. This advance achieved, they began to venture from behind and beneath the sheltering pebbles, to dare the urgent stream, and to work their way shoreward toward shallower waters where the perils which beset young salmon would be fewer and less insistent.

The egg from which he came having been one of the first to hatch, the tiny salmon mentioned in the opening paragraph was one of the first of the host to find his strength and to start the migration shoreward from the nest on the noisy bar. Perhaps a score started with him, trying the current, darting back to shelter, then more boldly venturing again. A passing trout, hungry and fierce-eyed, darted above them, heading up against the current; but being so few and scattered, they escaped his fatal attentions. Terrified, however, by the sudden shadow, they hid in the gravel and for some time made no further trial of the dangerous world.

When again the salmon atom adventured forth, he found himself in a greater company. Hundreds more of the tiny creatures had left the nest and were moving shoreward with him. As the defenceless throng advanced, he saw a couple of what seemed to him gigantic creatures dashing hither and thither among them, snapping them up greedily by twos and threes; and he himself barely escaped those greedy jaws by shooting forward in the nick of time. These seeming monsters were but young redfins, a couple of inches in length, whom he would soon come to despise and chase from his feeding-grounds.

His superior development and speed having so well served him, he was now a foot or more in advance of the throng, and so escaped another and even more wide-ranging peril. A huge shadow, as vast as that of the trout, swept down upon them, and as he shrank beneath a sharpedged stone he saw a big sucker settle lazily where the thronging fry were thickest. With round, horribly dilating and contracting mouth turned down like an inverted snout, the big fish sucked up the little wrigglers greedily, even drawing them out by his power of suction from their hidings in the gravel. Of the hundreds that had started on the first migration from the nest not more than three score were left to follow their frightened and panting mite of a leader into the shallows where the big sucker could not come.

Among the little stones close to shore, where the water was hardly more than an inch deep, even the greedy young redfins would not venture. Nevertheless there were plenty of enemies waiting eagerly for the coming of the fry, and the little fellow whose one hour of seniority had made him the pioneer of the shoal found all his ability taxed to guard the speck of life which he had so lately achieved. Keeping far enough from shore to avoid being stranded by some whimsical ripple, he nevertheless avoided the depths that were sufficient for the free hunting of the predatory minnows and redfins. Such of his kinsfolk as stayed farther out soon served, the greater number of them, as food for the larger river dwellers, while those who went too close inshore got cast up on the sand to die, or were pounced upon, as they lay close to the surface, by ravenous and unerring mosquitoes, which managed to pierce them even through a film of water a sixteenth of an inch or more in thickness. So it came about in a very brief time that of the countless throng emerging from the nest on the bar there remained but a hundred or so of the tiny fry to sustain the fortunes of that particular salmon family.

Even at the safest and most cunningly chosen depth, however, the little pioneer had plenty of perils to guard against. Secure from the suckers and redfins on the one hand, and from the mosquitoes on the other, he had yet for enemies certain predatory larvæ and water-beetles, as well as a few inch-long youngsters of the trout family, who were very active and rapacious. There was a water-beetle with hooked, pincer-like jaws and lightning rapidity of movement, which kept him almost ceaselessly on the alert, and filled him with wholesome terror as he saw it capture and devour numbers of his less nimble or less wary kin. And one day, when he had chanced, in the company of his diminished school of fry, to drift into a shallow cove where there was no current at all to disturb the water, he was chased by the terrible larva of a dragon-fly. The strange-looking creature, with what seemed a blank, featureless mask where its face and jaws ought to be, darted at him under the propulsion of jets of water sucked into its middle and spurted out behind. Having taken alarm in time, he made good his escape between the stalks of a fine water-weed where the big larva could not penetrate. From this retreat he saw his pursuer turn and pounce upon a small basking minnow. The mask that covered the larva's face shot out as if on a hinge, developed into two powerful, grappling claws, and clutched the victim in the belly. After a brief struggle, which terrified all the tiny creatures within a radius of three feet, the minnow was dragged down to a clump of weed and the victor proceeded to make his feast. The little salmon stole in terror from his hiding-place and darted out into the more strenuous but for him far safer waters where a live current stirred among the gravel. To be sure the beetles were there, and the hungry young trout; but he had learned the ways of both these species of foe and knew pretty well how to elude them. Meanwhile, as he was himself continually busy catching and devouring the tiny forms of life which abounded in those fruitful waters, – minute shell-fish, and the spawn of the water-snails that clung under the stones, gnats, and other small insects that fell on the water, and even other fry just from the egg, – he was growing at such a rate that presently the fierce water-beetles and the baby trout ceased to have any terrors for him. And at last, turning savagely as one of his old tormentors passed by, he caught a small beetle between his jaws and proceeded to make a meal of him. A few days later one of the baby trout was too slow in getting out of his way. He made a rush, caught his former tyrant, and, though the latter was more than an inch long, found no difficulty in swallowing him head first.

By this time the little salmon was between two and three inches long. He was what those learned in matters pertaining to the salmon would have called a "parr". His colouring was very beautiful, in a higher key than the colouring of a trout, and more brilliant, if less showy. There was none of the pink of the trout, but a clear silvery tone on sides and belly, with a shining blue-black along the back. The sides were marked with a row of black dots, set far apart and accentuated by a yellow flush around them, and with another row of spots of most vivid scarlet. Along the sides also ran a series of broad, vertical, bluish gray bars, the badge of the young of all the salmon tribe. He was a slender, strong-finned, finely moulded little fish, built to have his dwelling in swift currents and to conquer turbulent rapids. His jaws were strong and large, and he had no reason to fear anything of his size that swam the river.

There were now not more than two score of his brothers and sisters left alive, and these scattered far and wide over the shoaling stream. It was high summer in the Quahdavic country, and the Great South Branch was beginning to show its ledges and sandy bars above water. Deep green the full-leaved boughs of elm and ash, poplar and cedar leaned above the current; and along the little wild-meadows which here and there bordered the stream, where the lumbermen had had camps or "landings", the misty pink-purple blossoms of the milkweed poured a wild sweetness upon the air. In a shallow run near the shore, where the sunlight, falling through an overhanging cedar "sweeper", dappled the clear ripples, and the current was about eight inches deep, and there was no pool near to tempt the larger fish, the active and wary little parr took up his home. The same run was chosen by three of his fellows also, and by a couple of small trout of about the same size. But there was room enough, and food enough, in that run for all of them, so the association was harmonious.

Lying with his head up-stream, his long fins and broad tail slowly waving to hold him in his position against the current, the little parr waited and watched while his food was brought down to him by the untiring flow. Sometimes it was a luckless leaf-grub, or a caddis-worm torn from his moorings, that came tumbling and bumping down along the smooth pebbles of the bottom, to be gathered into the young salmon's eager maw. Sometimes it was a fly or moth or bee or beetle that came bobbing with drenched, helpless wings along the tops of the ripples. And once in awhile a pink-shelled baby crawfish in its wanderings would come sidling across the run, and be promptly gobbled up in spite of the futile threatenings of its tiny claws. The river was liberal in its providing for its most favoured children, these aristocratic and beautiful parr, so the youngster grew apace in his bright run.

Happy though his life was now, in every kind of weather, he was still beset with perils. He had, of course, no longer anything to fear from the journeying suckers, with their small, toothless mouths, but now and then a big-mouthed, red-bellied, savage trout would pass up the run, and in passing make a dash at one of the little occupants. In this way two of the parr, and one of the little trout, disappeared, – the trout folk having no prejudice whatever against cannibalism. But our pioneer, ceaselessly on the watch and matchlessly nimble, always succeeded in keeping well out of the way. Once he had a horrible scare, when a seven-pound salmon, astray from the main channel, made his way cautiously up the middle of the run and scraped over the bar. In this case, however, the alarm was groundless. The stranger was not seeking food, but only a way out of the embarrassing shallows.

Another peril that kept the young parr on the alert – an ever imminent and particularly appalling peril – was the foraging of the kingfishers. A pair of these noisy and diligent birds had their nest of six little ones in a hole in the red bluff just above the run, and they took ceaseless tribute from the finny tribes of the river. Like an azure arrow one of them would dart down into the river with a loud splash, and flap up again, usually, with a gleaming trout or parr held firmly between the edges of his great beak. If he missed his shot and came up with empty beak, he would fly off up the river with a harsh, clattering, startlingly loud cry of indignation and protest. Several times one or other of these troublesome foragers dropped into the run. The dappling of the shadow and sun, however, from the cedar, was a protection to the dwellers in this run; and only twice was the fishing there successful. The second little trout, and one more of the parr, were carried off. Then the birds forsook that particular bit of ripple and hunted easier waters.

In leaping at the flies which came down the surface of the run the little salmon one day got a severe but invaluable lesson. A large and gaudy fly, unlike anything that he had ever encountered before, appeared on the ripples over his head. Still more unlike those which he had encountered before, it did not hurry downward with the water, but maintained its position in a most mysterious fashion. While the parr eyed it curiously, wondering whether to try it or not, it suddenly moved straight up against the current, and was followed at a short distance by another queer-looking big fly, green and brown like a grasshopper. Excited by the strange behaviour of these two strangers, the parr rose sharply and hit the green fly with his tail, intending to drown it and investigate it at his leisure. To his astonishment both flies instantly disappeared. Chagrined and puzzled, he dropped back to the tail of the run, sulking.