A thunderstorm has burst on the common rat. Its complicity in the spread of the plague, which has been proved up to the hilt, has filled the cup of its iniquities to overflowing, and we have awakened to the fact that it is and always has been an arch-enemy of mankind. Simultaneously, in widely separated parts of the world, a "pogrom" has been proclaimed, and the accounts of the massacre which come to us from great cities like Calcutta and Bombay are appalling and almost incredible. They would move to pity the most callous heart, if pity could be associated with the rat. But it cannot.

The wild rat deserves that humane consideration to which all our natural fellow-creatures on this earth are entitled; but the domestic rat (I use this term advisedly, for though man has not domesticated it, it has thoroughly domesticated itself) cannot justify its existence. It is a fungus of civilisation. If it confined itself to its natural food, the farmer's grain, the tax which it levies on the country would still be such as no free people ought to endure. But it confines itself to nothing. As Waterton says: "After dining on carrion in the filthiest sink, it will often manage to sup on the choicest dainties of the larder, where like Celoeno of old vestigia foeda relinquit." It kills chickens, plunders the nests of little birds, devouring mother, eggs and young, murders and feeds on its brothers and sisters and even its own offspring, and not infrequently tastes even man when it finds him asleep. The bite of a rat is sometimes very poisonous, and I have had to give three months' sick leave to a clerk who had been bitten by one. Add to this that the rat multiplies at a rate which is simply criminal, rearing a family of perhaps a dozen every two or three months, and no further argument is needed to justify the war which has been declared against it. Every engine of war will, no doubt, be brought into use, traps of many kinds, poisons, cats, the professional rat-catcher, and a rat bacillus which, if once it gets a footing, is expected to originate a fearful epidemic.

But I need not linger any more among rats, which are not my subject. I am writing in the hope that this may be an opportune time to put in a plea for a much persecuted native of this and many other countries, whose principal function in the economy of nature is to kill rats and mice. The barn, or screech, owl, which is found over a great part of Europe and Asia and also in America, was once very common in Britain, inhabiting every "ivy-mantled tower," church steeple, barn loft, hollow tree, or dovecot, in which it could get a lodging. But it was never welcome. Like the Jews in the days of King John it has been relentlessly persecuted by superstition, ignorance and avarice. Avarice, instigated by ladies and milliners, has looked with covetous eye on its downy and beautiful plumes; while ignorance and superstition have feared and hated the owl in all countries and all ages. In ancient Rome it was a bird of evil omen.

In India, to-day, if an owl sits on the house-top, the occupants dare scarcely lie down to sleep, for they know that the devil is walking the rooms and marking someone for death. Lady Macbeth, when about the murder of Duncan, starts and whispers,

And even as late as the nineteenth century, Waterton's aged housekeeper "knew full well what sorrow it had brought into other houses when she was a young woman," Witches, like modern ladies of fashion, set great value on its wings. The latter stick them on their hats, the witches in Macbeth threw them into their boiling cauldron. Horace's Canidia could not complete her recipe without

We may suppose that in Britain these superstitions are gone for ever, killed and buried by board schools and compulsory education. If they are (there is room for an if) they have been succeeded by a worse, the superstition of gamekeepers and farmers. It is worse in effect, because these men have guns, which their predecessors had not. And it is more wicked, because it is founded on an ignorance for which there is no excuse. How little harm the barn owl is likely to do game may be inferred from the fact that, when it makes its lodging in a dovecot, the pigeons suffer no concern! Waterton (and no better authority could be quoted) scouts the idea, common among farmers, that its business there is to eat the pigeons' eggs. "They lay the saddle," he says, "on the wrong horse. They ought to put it on the rat." His predecessor in the estate had allowed the owls to be destroyed and the rats to multiply, and there were few young pigeons in the dovecot. Waterton took strong measures to exterminate the rats, but built breeding places for the owls, and the dovecot, which they constantly frequented, became prolific again.

But granting that the owls did twice the injury to game with which they are credited, it would be repaid many times over by their services. Waterton well says that, if we knew its utility in thinning the country of mice, it would be with us what the ibis was with the Egyptians—a sacred bird. He examined the pellets ejected by a pair of owls that occupied a ruined gateway on the estate. Every pellet contained skeletons of from four to seven mice. Owls, it may be necessary to explain, swallow their food without separating flesh from bone, skin and hair, and afterwards disgorge the indigestible portions rolled up into little balls. In sixteen months the pair of owls above-mentioned had accumulated a deposit of more than a bushel of these pellets, each a funeral urn of from four to seven mice! In the old Portuguese fort of Bassein in Western India I noticed that the earth at the foot of a ruined tower was plentifully mixed with small skulls, jaws and other bones. Taking home a handful and examining them, I found that they were the remains of rats, mice and muskrats.

The owl kills small birds, large insects, frogs and even fishes, but these are extras: its profession is rat-catching and mousing, and only those who have a very intimate personal acquaintance with it know how peculiarly its equipment and methods are adapted to this work. The falcon gives open chase to the wild duck, keeping above it if possible until near enough for a last spurt; then it comes down at a speed which is terrific, and, striking the duck from above, dashes it to the ground. The sparrow hawk plunges unexpectedly into a group of little birds and nips up one with a long outstretched foot before they have time to get clear of each other. The harrier skims over field, copse and meadow, suddenly rounding corners and topping fences and surprising small birds, or mice, on which it drops before they have recovered from their surprise.

The owl does none of these things. For one thing, it hunts in the night, when its sight is keenest and rats are abroad feeding. Its flight is almost noiseless and yet marvellously light and rapid when it pleases. Sailing over field, lane and hedgerow and examining the ground as it goes, it finds a likely place and takes a post of observation on a fence perhaps, or a sheaf of corn. Here it sits, bolt upright, all eyes. It sees a rat emerge from the grass and advance slowly, as it feeds, into open ground. There is no hurry, for the doom of that rat is already fixed. So the owl just sits and watches till the right moment has arrived; then it flits swiftly, softly, silently, across the intervening space and drops like a flake of snow. Without warning, or suspicion of danger, the rat feels eight sharp claws buried in its flesh. It protests with frantic squeals, but these are stopped with a nip that crunches its skull, and the owl is away with it to the old tower, where the hungry children are calling, with weird, impatient hisses, for something to eat.

The owl does not hunt the fields and hedgerows only. It goes to all places where rats or mice may be, reconnoitres farmyards, barns and dwelling houses and boldly enters open windows. Sometimes it hovers in the air, like a kestrel, scanning the ground below. And though its regular hunting hours are from dusk till dawn, it has been seen at work as late as nine or ten on a bright summer morning. But the vulgar boys of bird society are fond of mobbing it when it appears abroad by day, and it dislikes publicity.

The barn owl lays its eggs in the places which it inhabits. There is usually a thick bed of pellets on the floor, and it considers no other nest needful. The eggs are said to be laid in pairs. There may be two, four, or six, of different eggs, in the nest, and perhaps a young one, or two, at the same time. Eggs are found from April, or even March, till June or July, and there is, sometimes at any rate, a second brood as late as November or December. This owl does not hoot, but screeches. A weird and ghostly voice it is, from which, according to Ovid, the bird has its Latin name, Strix (pronounced "Streex," probably, at that time).

It is a sound which, coming suddenly out of the darkness, might well start fears and forebodings in the dark and guilty mind of untutored man, which would not be dispelled by a nearer view of the strange object from which they proceeded. White, ghostly, upright, spindle-shaped and biggest at the top, where two great orbs flare, like fiery bull's-eyes, from the centres of two round white targets, it stands solemn and speechless; you approach nearer and it falls into fearsome pantomimic attitudes and grimaces, like a clown trying to frighten a child. And now a new horror has been added to the barn owl. The numerous letters which appeared in The Times and were summarised, with comments, by Sir T. Digby Pigott, C.B., in The Contemporary Review of July 1908, leave no reasonable room for doubt that this bird sometimes becomes brightly luminous, and is the will-o'-the-wisp for believing in which we are deriding our forefathers. All things considered, I cannot withhold my sympathy and some respect for the superstition of aged housekeepers, Romans and Indians. For that of gamekeepers and farmers I have neither. All our new schemes of "Nature study" will surely deserve the reproach of futility if, in the next generation, every farmhouse in England has not its own Owl Tower for the encouragement of this friend of man.