Chatterbox, 1906 Part 40

THE SHEPHERD MOON.

I love to wait till the red sun hides, When from the dusk the Shepherd Moon glides; And by twos and threes around him peep His flock of little white starry sheep.

All night they ramble so far and high, Their pasture wide is the dark blue sky; Then the Shepherd Moon goes on his way, And leads them back to the folds of Day.

PEEPS INTO NATURE'S NURSERIES.

V.--THE LIFE-HISTORY OF THE FRESH-WATER MUSSEL.

Most readers of _Chatterbox_ must have seen the fresh-water mussel in its native element. Let those who have not, search in the shallow water of the nearest river or brook till they are successful. When the stream is clear you may often see them lying on the bottom; in deeper water, you may catch them if you go out armed with a big, long-handled rake; plunge this into the water, drag it along the bottom, and carefully haul up the entangled mud and weed. Sooner or later your search should be rewarded. I have caught hundreds this way. Some of them were not more than an inch and a half long, and when placed in a gla.s.s jar were so transparent, that I could watch the beating of the heart through the sh.e.l.l. Indeed, I have two such little beauties before me, on my study table, as I write. One has partly buried himself in the mud, the other is lying on the surface. But, when full-grown, this transparency pa.s.ses away, and they attain a perfectly huge size--six inches long at any rate!

Once upon a time, no doubt, the ancestors of these creatures lived in the sea; then they migrated to the rivers, creeping farther and farther up into fresh water, till at last their descendants have got so used to this element that they can live only in fresh water. Now, when animals gradually change their mode of life in this way, they at the same time undergo a great many structural and const.i.tutional changes--some slight, some profound--and among these the most important are changes in the provision for the young. There is, as you know, a constant migration going on among the more active animals between the sea and the river, which is entirely on account of the needs of the young. Thus, salmon leave the sea yearly and undertake perilous journeys up the rivers, solely that they may lay their eggs there: while eels, on the other hand, as we have seen, are impelled by instinct to pursue exactly the opposite course, and to brave all dangers, that they may provide a nursery for their young in the deepest depths of the ocean.

Let us apply this to the fresh-water mussels. The ancestors of these very helpless creatures lived, I have remarked, in the sea; and we may be pretty certain that their eggs are hatched out into what we call larvae, or imperfectly developed animals, precisely similar to the young, or larvae, of the marine mussel of our seas. Now, this larva has the form of a tiny little creature covered with 'swimming' hairs. By the constant waving motions of these hairs, the little body is driven through the water, till at last, reaching a favourable spot, or tired out, they settle down at the bottom of the sea and turn into mussels, This free-and-easy life is all very well for the salt-water mussels, with the great wide sea to roam in; but such freedom in rivers would by no means be safe, because, though mussels swim, they are, by reason of their small size, quite unable to force their way against strong currents. Thus, on the outgoing tide, they would be swept off to sea, and would die even before this was reached--as soon, indeed, as the water became really salt. So, to prevent such a disaster, the fresh-water mussel carefully nurses her young between her gills, till they are old enough to help themselves. You will be surprised when I tell you the strange device they have come to adopt, so soon as they are cast adrift, whereby they may complete their days of infancy. Shielded throughout the winter months, they are turned adrift on the first warm day of Spring, a troop of very lively youngsters indeed. Each is encased in a very wonderful sh.e.l.l (S in the figure in the top left-hand corner of the ill.u.s.tration), quite unlike that of their parents, being triangular in shape, and armed with a pair of pointed teeth (T). By means of powerful muscles this sh.e.l.l is made to open and shut with great rapidity, and thus the body of the little creature is quickly driven through the water in a series of spasmodic jumps. Then comes a period of rest, obtained by using the long thread or 'byssus' (B) as a float, this thread being thrown out along the surface of the water. Then the hunt for a host begins again. On and on they go, till one after another--'curiouser and curiouser!'--seizes hold of a fish by means of its hooks. Having caught hold tight, each clings like grim death, and as a result of the irritation set up in the poor fish's skin, swelling follows and soon grows up all round the young mussel, and makes him a prisoner. But this is just what he wants. Snugly tucked away in his living cradle he slowly a.s.sumes his adult shape, and at last bursts his prison and falls to the bottom!

[Ill.u.s.tration: Fresh-water Mussels.]

There is yet another reason for this very strange and somewhat cruel procedure. The love of self, among the lower animals, is so strong that parents always drive away their young so soon as they become capable of feeding, and fending for themselves; because, if they did not adopt stern measures of this sort, famine and disease would be the result, owing to overcrowding. On the whole, this banishment is not so hard as it looks, the young having no sentiment for the place of their birth, and being probably more capable of migrating than the parents. But the method adopted by the fresh-water mussel is wasteful and dangerous; wasteful, because thousands and thousands of young ones necessarily die every year, through failing to catch their fish; and dangerous, because those who succeed are liable to contract the habit of being a parasite, and this, as always, leads to degradation and ruin. Finally, whenever young animals have to depend on other creatures to provide them with a lodging during some part of their growth, many more thousands have to be hatched than is the case where the young are dependent on themselves entirely, for it must always happen that the necessary hosts are hard to catch, and the young die in countless thousands, being unable to succeed in their search.

W. P. PYCRAFT, F.Z.S., A.L.S.

TAKING IT LITERALLY.

All orders to native servants in India must be very carefully and exactly given, for a black servant takes care to obey to the very letter. An Englishman once took with him a native lad as a servant when going on a boating journey. There were no such chances of washing on board the boat as one enjoys at home in a house. Accordingly, a bucket was dipped into the river, and it served as a washing-basin. One day the boy was told to bring some water, and in doing so happened to spill a good deal over his master's feet.

[Ill.u.s.tration: "The lad emptied the pail over his employer."]

'You clumsy fellow!' cried his master, angrily, 'why don't you throw it all over me?'--of course not using the words in their literal sense.

'Yes, sahib!' said the lad, and, to his master's astonishment, he took up the pail, and emptied it over his employer!

S.

'PEEPS INTO NATURE'S NURSERIES.'

The articles in _Chatterbox_ under this heading have aroused great interest, and doubtless many readers would like to know more about these fascinating subjects than there is room for in the columns of _Chatterbox_. Mr. Pycraft, the author of these articles, is a well-know authority on Natural History, and is constantly engaged in research at the wonderful Natural History Museum at South Kensington, a place which many _Chatterbox_ readers probably know well; and he has very generously undertaken to give any further information, or answer questions, if readers of _Chatterbox_ like to write to him personally about the matter. Letters should be addressed to--

W. P. PYCRAFT, Esq., c/o The Editor of _Chatterbox_, 3 Paternoster Buildings, E.C.

Readers of _Chatterbox_ will probably be glad of this chance of obtaining information direct from a first-rate authority.

THE GIANT OF THE TREASURE CAVES.

(_Continued from page 125._)

It so happened that Alan _had_ seen and heard everything. On leaving Marjorie, he had succeeded in getting round the hedge, only to find that it extended to another part of the rampart, and was strongly fortified with barbed wire the whole way. It enclosed a portion of ground completely cleared of trees and brushwood, thus enabling the sun to shine upon the old walls unhindered by foliage. The grey, crumbling stones seemed to spread its heat, and the gra.s.s at their base seemed withered and brown. Alan's curiosity was aroused, and he determined to climb the nearest tree. It was the only way to discover what the plot of ground contained, and whether there were any reasons for all the care which appeared to have been taken to give it the full benefit of the hot summer sunshine.

Having selected a young oak which he considered might suit his purpose, Alan began to climb. He had made but little way when the sound of some body moving softly within the enclosure arrested his attention. He paused, clinging to the trunk and listening anxiously. Presently the movement ceased, and he wondered whether he had been heard. He could not remain where he was, however. That would mean certain discovery. He must either drop to the ground and get away, or stick to his original purpose and trust to the foliage to conceal him. Deciding on the latter plan, he crept slowly up till he reached the first branch strong enough to support his weight. Here a bitter disappointment awaited him. His labour had been in vain. Not a glimpse of the fenced-in ground would the dense summer foliage allow him. He was afraid to change his position lest he should be heard, and could only lie p.r.o.ne upon the bough, listening.

He had not long to wait.

A low murmur; a stir, as if some one was attempting to get through the hedge. 'Can't do it,' came a whisper. 'Give me a leg up, and I will manage it that way. Got the rope with you?'

Alan strained his ears for the answer, but none came. The men--there were evidently two--were moving as quietly as possible, a.s.sisting each other, and the result of their efforts soon became visible. Thomas's head appeared above the hedge, his hand caught hold of a branch, and the next moment he was close to Alan's tree. A minute later and his companion joined him. Lucky indeed it was for Alan that the leaves screened him so effectually, and that he was so securely placed that no movement was required to maintain his position. The faintest rustle would have betrayed him.

Thomas was holding a box in his hands, which he carried with the greatest care. No time was wasted in talking. Their sole anxiety seemed to be to get through the brushwood as quickly and noiselessly as possible. Alan watched them as they sped along in the direction of the Smuggler's Hole, in the woody hollow. He had no doubt whatever as to their destination, and only waited till they were beyond earshot to jump down and follow them. In his excitement, he forgot that Marjorie was waiting for him.

Something had been stolen, and he alone could trace the thieves. It mattered not whether it were jewels, or silver, or the merest trifle. He meant to recover it: quietly, if he could; if not, then he must fight for it. It must be of value, however. Had not Thomas received a handsome offer for purloining it?

With beating heart, and quick but stealthy step, he followed the two men, love of adventure spurring him on and blinding him to the real dangers of the pursuit. He was pleased, too, that his enjoyment was not wholly selfish: he would be of real service to some person--he would not care even if it were to Peet himself. It was quite possible it was Peet.

He made such a fuss about the ruined summer-house, and was so rigid about keeping the door shut, that no doubt he did have something he valued there. It would be fun if Alan were to recover Peet's lost property for him.

As Alan sped along, he tried to make up some plan for securing the box and escaping with it. He knew neither man would hesitate to sacrifice him in their efforts to get it back, and they were not likely to stick at a trifle if he gave them trouble. He was quite alone; a boy against two men. Still, the thought of giving up the pursuit never occurred to him.

'It must be mind _versus_ matter,' he thought, as he chuckled at the idea of outwitting Thomas.

It was not difficult to creep after the men down the rocky steps of the Smuggler's Hole, though they appeared dark after the brilliant sunshine.

He was thankful, however, that he had been over the ground before with Marjorie, and had a pretty correct notion of the whereabouts of the dangerous places.

By the time he had reached the cave, the men were sitting on the rocks at the highest part, the tide being still too high for them to go very far down the cave. It was well for Alan that he had their light to guide him, for he could not venture on one for himself. Indeed, he had to keep on the darkest side, close to the wall, for fear of being seen. The men, he was glad to perceive, had so little suspicion that they were being watched that they never even turned their heads or lowered their voices.

The box had been placed upon a flat rock just behind them for safety. To get near it was now Alan's aim.

The faint sound of the receding tide and the voices of the two men alone broke the stillness. The slightest noise would be heard therefore, the rolling of a pebble, a slip on the green, slimy seaweed. As he gradually crept nearer with the utmost caution, Alan listened to the talk of the men.

'I'm not sure this was the best way to come,' said the one Alan took to be a foreigner. 'We shall be hindered by the tide. How much longer shall we have to sit here?'

'About a hour, or perhaps a hour and a half,' returned Thomas. 'And when we are on the beach, what do you mean to do? We can't get away without a boat, anyhow.'

'I have made my arrangements. Jean Marie Fargis is up in these parts. He has fished now and again in English waters, and run before the wind at the first sign of danger. I knew the cut of his rig the other day when he was cruising round about.'

'Fishing?' said Thomas, incredulously.