“The rat has formidable weapons in the shape of four small, long, and very sharp teeth, two of which are in the upper and two in the lower jaw. These are formed in the shape of a wedge, and by the following wonderful provision of nature have always a fine, sharp, cutting edge. On examining them carefully, we find that the inner part is of a soft, ivory-like composition, which may be easily worn away, whereas the outside is composed of a glass-like enamel, which is excessively hard. The upper teeth work exactly into the under, so that the centres of the opposed teeth meet exactly in the act of gnawing; the soft part is thus being perpetually worn away, while the hard part keeps a sharp, chisel-like edge; at the same time the teeth grow up from the bottom, so that as they wear away a fresh supply is ready. The consequence of this arrangement is, that, if one of the teeth be removed, either by accident or on purpose, the opposed tooth will continue to grow upwards, and, as there is nothing to grind them away, will project from the mouth and turn upon itself; or, if it be an under-tooth, it will even run into the skull above. There is a preparation in the museum of the Royal College of Surgeons which well illustrates this fact. It is an incisor tooth of a rat, which, from the cause above mentioned, has increased its growth upwards to such a degree, that it has formed a complete circle and a segment of another; the diameter of it is about large enough to admit a good-sized thumb. It is accompanied by the following memorandum, addressed by a Spanish priest to Sir J. Banks, who presented it to the Museum: ‘I send you an extraordinary tooth of a rat. Believe me, it was found in the Nazareth garden (to which order I belong). I was present when the animal was killed, and took the tooth; I know not its virtues, nor have the natives discovered them.’”
We once saw a newly-killed rat to whom this misfortune had occurred. The tooth, which was an upper one, had in this case also formed a complete circle, and the point in winding round had passed through the lip of the animal. Thus the ceaseless working of the rat’s incisors against some hard substance is necessary to keep them down, and if he did not gnaw for his subsistence, he would be compelled to gnaw to prevent his jaw being gradually locked by their rapid development.
The destructive nature of the rat, the extraordinary manner in which he multiplies, and his perpetual presence—for where there is a chink that he can fill, and food for him to eat, there he will be, notwithstanding that a long line of ancestors have one after another been destroyed on the spot[11]—necessitates some counteracting influence to keep him within due bounds. This is done by making him the prey of hunting-animals and reptiles, beginning with man, and running down the chain of organized life to the gliding snake. The poor rat, although he doubtless does service as a scavenger, and must have his use in fulfilling some essential purpose of creation, finds favour nowhere: every man’s hand, nearly every feline paw, and many birds’ beaks are against him. The world thinks of him, as of the pauper boy in “Oliver Twist,”—“Hit him hard; he ain’t a’got no friends.” Dwelling in the midst of alarms, he might be supposed to pass an uneasy and nervous existence. But it is nothing of the kind. The same Providence which has furnished him with the teeth suitable to the work they have to perform, has endowed him with the feelings proper to his lot; and no animal, if he be watched from a distance, appears more happy and complacent. In danger he preserves a wonderful presence of mind, and acts upon the principle that while there is life there is hope. His cunning on such occasions is often remarkable, and evinces a reasoning power of no contemptible order:—
“A traveller in Ceylon,” says Mrs. Lee, in her entertaining “Anecdotes of Animals,” “saw his dogs set upon a rat, and, making them relinquish it, he took it up by the tail, the dogs leaping after it the whole time. He carried it into his dining-room, to examine it by the light of the lamp, during the whole of which period it remained as if it were dead,—limbs hanging, and not a muscle moving. After five minutes he threw it among the dogs, who were still in a state of great excitement, and, to the astonishment of all present, it suddenly jumped upon its legs, and ran away so fast that it baffled all its pursuers.”
The sagacity of the rat in eluding danger is not less than his craftiness in dealing with it when it comes. A gentleman, Mr. Jesse relates, who fed his own pointers, observed through a hole in the door a number of rats eating from the trough with his dogs, who did not attempt to molest them. Resolving to shoot the intruders, he next day put the food, but kept out the dogs. Not a rat came to taste. He saw them peering from their holes, but they were too well versed in human nature to venture forth without the protection of their canine guard. After half an hour the pointers were let in, when the rats forthwith joined their hosts, and dined with them as usual. If it comes to the worst, and the rat is driven to bay, he will fight with admirable resolution. A good-sized sewer-rat has been known to daunt for a moment the most courageous bull-terrier, advancing towards him with tail erect, and inflicting wounds of the most desperate nature. The bite of any rat is severe, and that of a sewer-rat so highly dangerous, that valuable dogs are rarely allowed by their masters to fight them. The garbage on which they live poisons their teeth, and renders the wounds they make deadly. Even with his great natural enemy and superior, the ferret, he will sometimes get the advantage by his steady bravery and the superiority of his tactics. Mr. Jesse describes an encounter of the kind, the circumstances of which were related to him by a medical gentleman at Kingston:—
“Being greatly surprised that the ferret, an animal of such slow locomotive powers, should be so destructive to the rat tribe, he determined to bring both these animals fairly into the arena, in order to judge of their respective powers; and having selected a fine large and full-grown male rat and also an equally strong buck ferret, which had been accustomed to hunt rats, my friend, accompanied by his son, turned these two animals loose in a room without furniture, in which there was but one window. Immediately upon being liberated, the rat ran round the room as if searching for an exit. Not finding any means of escape, he uttered a piercing shriek, and with the most prompt decision took up his station directly under the light, thus gaining over his adversary (to use the language of other duellists) the advantage of the sun. The ferret now erected his head, sniffed about, and began fearlessly to push his way towards the spot where the scent of his game was strongest, facing the light in full front, and preparing himself with avidity to seize upon his prey. No sooner, however, had he approached within two feet of his watchful foe, than the rat, again uttering a loud cry, rushed at him with violence, and inflicted a severe wound on the head and neck, which was soon shown by the blood which flowed from it; the ferret seemed astonished at the attack, and retreated with evident discomfiture; while the rat, instead of following up the advantage he had gained, instantly withdrew to his former station under the window. The ferret soon recovered the shock he had sustained, and, erecting his head, once more took the field. This second rencontre was in all its progress and results an exact repetition of the former—with this exception, that, on the rush of the rat to the conflict, the ferret appeared more collected, and evidently showed an inclination to get a firm hold of his enemy; the strength of the rat, however, was very great, and he again succeeded not only in avoiding the deadly embrace of the ferret, but also in inflicting another severe wound on his neck and head. The rat a second time returned to his retreat under the window, and the ferret seemed less anxious to renew the conflict. These attacks were resumed at intervals for nearly two hours, all ending in the failure of the ferret, who was evidently fighting to a disadvantage from the light falling full on his eye whenever he approached the rat, who wisely kept his ground and never for a moment lost sight of the advantage he had gained. In order to prove whether the choice of this position depended upon accident, my friend managed to dislodge the rat, and took his own station under the window; but the moment the ferret attempted to make his approach, the rat, evidently aware of the advantage he had lost, endeavoured to creep between my friend’s legs, thus losing his natural fear of man under the danger which awaited him from his more deadly foe.”
Driven from his defensive position, the rat continued his attacks, but with an evident loss of courage, and the ferret ultimately came to the death-grapple with his crafty antagonist. A similar battle was witnessed by a friend, with the difference that the rat, being undisturbed in his advantageous position with regard to the light, finally beat off the ferret, which was absolutely bitten into shreds over the head and muzzle. The repetition of the same conduct by a second animal shows that this particular species of cunning is a general faculty of the tribe. The main superiority of the ferret is in his retaining his hold when once he has fastened on his prey, sucking his life’s blood the while; whereas the rat fights by a succession of single bites, which wound but do not destroy. The snake prevails by his venom. Mrs. Lee relates the particulars of a combat in Africa, in which rat and snake repeatedly closed and bit at one another, separating after each assault, and gathering up strength for a fresh attack. At length the rat fell, foamed at the mouth, swelled to a great size, and died in a few minutes.[12]
If he can be savage when self-protection requires, he also has his softer moments, in which he shows confidence in man almost as strong as that exhibited by the dog or cat. An old blind rat, on whose head the snows of many winters had gathered, was in the habit of sitting beside our own kitchen fire, with all the comfortable look of his enemy, the cat; and such a favourite had he become with the servants, that he was never allowed to be disturbed. He unhappily fell a victim to the sudden spring of a strange cat. A close observation of these animals entirely conquers the antipathy which is entertained towards them. Their sharp and handsome heads, their bright eyes, their intelligent look, their sleek skins, are the very reverse of repulsive; and there is positive attraction in the beautiful manner in which they sit licking their paws and washing their faces—an occupation in which they pass a considerable portion of their time. The writer on rats in Bentley’s Miscellany relates an anecdote of a tame rat, which shows that he is capable of serving his master as well as of passing a passive existence under his protection. The animal belonged to the driver of a London omnibus, who caught him as he was removing some hay. He was spared because he had the good luck to be piebald, became remarkably tame, and grew attached to the children. At night he exhibited a sense of the enjoyment of security and warmth, by stretching himself out at full length on the rug before the fire; and on cold nights, after the fire was extinguished, he would creep into his master’s bed. In the daytime, however, his owner utilized him. At the word of command, “Come along, Ikey,” he would jump into the ample great-coat pocket, from which he was transferred to the boot of the omnibus. Here his business was to guard the driver’s dinner; and if any person attempted to make free with it, the rat would fly at them from out the straw. There was one dish alone of which he was an inefficient protector. He could never resist plum-pudding; and though he kept off all other intruders, he ate his fill of it himself. These are by no means extraordinary instances of the amiable side of rat nature when kindly treated by man, and we could fill pages with similar relations. But it seems, in addition to his other merits, that he possesses dramatic genius. We have heard of military fleas, we have seen Jacko perform his miserable imitation of humanity on the top of a barrel-organ; but who ever heard of a rat’s turn for tragedy? Nevertheless, a Belgian newspaper not long since published an account of a theatrical performance by a troop of rats, which gives us a higher idea of their intellectual nature than anything else which is recorded of them. This novel company of players were dressed in the garb of men and women, walked on their hind legs, and mimicked with ludicrous exactness many of the ordinary stage effects. On one point only were they intractable. Like the young lady in the fable, who turned to a cat the moment a mouse appeared, they forgot their parts, their audience, and their manager, at the sight of the viands which were introduced in the course of the piece; and, dropping on all-fours, fell to with the native voracity of their race. The performance was concluded by their hanging in triumph their enemy the cat, and dancing round her body.
The rat, as we have said, has many enemies: the weazel, the pole-cat, the otter, the dog, the cat, and the snake hunt him remorselessly all over the world. Man, however, is his most relentless and destructive enemy. In some places he is killed for food, as in China, where dried split rats are sold as a dainty. The chiffonniers of Paris feed on them without reluctance. Nor is rat-pie altogether obsolete in our own country. The gipsies continue to eat such as are caught in stacks and barns, and a distinguished surgeon of our time frequently had them served up at his table. They feed chiefly upon grain; and it is merely the repulsive idea which attaches to this animal under every form that causes it to be rejected by the same man who esteems the lobster, the crab, and the shrimp a delicacy, although he knows that they are the scavengers of the sea. They were not always so nice in the navy. An old captain in her Majesty’s service informs us that on one occasion, when returning from India, the vessel was infested with rats, which made great ravages among the biscuit. Jack, to compensate for his lost provisions, had all the spoilers he could kill, put into pies, and considered them an extraordinary delicacy. At the siege of Malta, when the French were hard pressed, rats fetched a dollar apiece; but the famished garrison marked their sense of the excellence of those which were delicately fed by offering a double price for every one caught in a granary. Man directs his hostility against the rat, however, chiefly because he considers him a nuisance; and the gin and poison, cold iron and the bowl, a dismal alternative, are accordingly presented to him. With the former he is not so easily caught, and will never enter a trap or touch a gin in which any of his kind have fretted and rubbed. Poison is a more effectual method, but it is not always safe. Rats which have been beguiled into partaking of arsenic instantly make for the water to quench their intolerable thirst, and, though they usually withdraw from the house, they may resort in their agony to an in-door cistern, and remain there to pollute it.[13] The writer who calls himself “Uncle James,” and who, for a reason that will shortly appear, is exceedingly anxious to impress the public with the belief that the best mode of getting rid of the rat is to hunt him with terriers, states that a dairy-farmer in Limerick poisoned his calves and pigs by giving them the skim milk at which rats had drunk when under the pangs produced by arsenic. One mode of clearing them out of a house is either to singe the hair of a devoted rat, or else to dip his hind-quarters into tar, and then turn him loose, when the whole community will take their leave for a while. But this is only a temporary expedient, and in the interim the offenders are left to multiply, and perchance transfer their ravages to another part of the domain where they are equally mischievous. The same objection applies to the remedy of pounding the common dog’s-tongue, when gathered in full sap, and laying it in their haunts. They retire only to return. The Germans turn the rat himself into a police-officer to warn off his burglarious brethren. Dr. Shaw, in his General Zoology, states that a gentleman who travelled through Mecklenburg about thirty years ago saw one at a post-house with a bell about its neck, which the landlord assured him had frightened away the whole of the “whiskered vermin” which previously infested the place. Mr. Neele says that at Bangkok, the Siamese capital, the people are in the habit of keeping tame rats, which walk about the room, and crawl up the legs of the inmates, who pet them as they would a dog. They are caught young, and, attaining a monstrous size by good feeding, take the place of our cats, and entirely free the house of their own kind. But the most effectual and in the end the cheapest remedy is an expert rat-catcher. Cunning as an experienced old rat becomes, he is invariably checkmated when man fairly tries a game of skill with him. The well-trained professor of the art, who by long habit has grown familiar with his adversary’s haunts and tactics, his hopes and fears, his partialities and antipathies, will clear out a house or a farmyard, where a novice would merely catch a few unwary adventurers and put the rest upon their guard. The majority of the world have, happily for themselves, a better office, and the regular practitioner might justly address the amateur in much the same words that the musician employed to Frederick the Great, when the royal flute-player was expecting to be complimented on his performance: “It would be a discredit to your Majesty to play as well as I.”
“Uncle James,” however, is of a different opinion. This author considers that every man should be his own rat-catcher, which he evidently believes to be the most improving, dignified, and fascinating calling under the sun, as he considers rats themselves to be the crying evil of the day, second only in his estimation to the grand injustice of the old corn-law. Indeed, we cannot see from his own premises how the evil can be second to any great destructive principle, earthquakes included. He takes a single pair of rats, and proves satisfactorily that in three years, if undisturbed, they will have thirteen litters of eight each at a birth, and that the young will begin littering again when six months old; by this calculation he increases the original pair at the end of three years to six hundred and fifty-six thousand eight hundred and eight. Calculating that ten rats eat as much in one day as a man, which we think is rather under than over the fact, the consumption of these rats would be equal “to that of sixty-four thousand six hundred and eight men the year round, and leave eight rats in the year to spare.” Now, if a couple of rats could occasion such devastation in three years after the original pair marched out of the ark, how comes it that the descendants of the myriads which ages ago co-existed among us have not eaten up the earth and the fullness thereof? Uncle James conveniently forgets that animals do not multiply according to arithmetical progression, but simply in proportion to the food provided for them. He must not, however, be expected to be wiser than Malthus on the subject of animal reproduction, and he has the additional incentive to error, that he evidently paints up his horrors for an artful purpose. There can be no sort of doubt that he has several well-bred terriers to dispose of, and hence the following panacea for all the evils which afflict society.