‘We swear by the glueboard,’ he says. ‘It’s simply a composition shingle smeared on one side with a thick, strong, black glue. We developed this glue twenty-five years ago and it’s probably the stickiest stuff known to man. It has been widely copied in the trade and is used all over. The shingle is pliable. It can be laid flat on the floor or bent around a pipe. We place them on rat runs – the paths rats customarily travel on – and that’s where skill comes in; you have to be an expert to locate the rat runs. We lay bait around the boards. If any part of the animal touches a board, he’s done for. When he tries to pull away, he gets himself firmly caught in the glue. The more he struggles, the more firmly he’s caught. Next morning the rat, glueboard and all, is picked up with tongs and burned. We used to bait with ground beef, canned salmon, and cheese, but we did some experimenting with many other foods and discovered that peanut butter is an extremely effective rat bait. Rats have to be trapped, poisoned, or gassed. Cats, if they’re hungry enough, will kill rats, but you can’t really depend on them – in many cases, they’re able to keep the number of rats down, but they’re seldom able to exterminate them.
‘Insects, particularly cockroaches and bedbugs, are the Number One exterminating problem in New York. Rats come next. Then mice. Perhaps I shouldn’t tell this, but most good exterminators despise rat jobs because they know that exterminating by itself is ineffective. You can kill all the rats in a building on a Monday and come back on a Wednesday and find it crawling with them. The only way rats can be kept out is to ratproof the building from sub-basement to skylight. It’s an architectural problem; you have to build them out. Killing them off periodically is a waste of time. We refuse to take a rat job unless the owner or tenant promises to stop up every hole and crack through which rats can get in, and seal up or eliminate any spaces inside the building in which they can nest. That may sound like cutting our own throats, but don’t worry: insects are here to stay and we’ll always have more work than we can do. Twenty-five years ago there were easily two rats for every human being in the city. They gradually decreased to half that, for many reasons. Better sanitary conditions in general is one reason. Fewer horses and fewer stables is another. The improved packaging of foods helped a lot. An increase in the power of the Department of Health is an important reason. Nowadays, if a health inspector finds rat tracks in a grocery or a restaurant, all he has to do is issue a warning; if things aren’t cleaned up in a hurry, he can slap on a violation and make it stick. The most important reason, however, is the modern construction of buildings and the widespread use of concrete. It’s almost impossible for a rat to get inside some of the newer apartment houses and office buildings in the city. If he gets in, there’s no place for him to hide and breed.’
None of the rats in New York are indigenous to this country. The black rat has been here longest. Its homeland is India. It spread to Europe in the Middle Ages along trade routes, and historians are quite sure that it was brought to America by the first ships that came here. It is found in every seaport in the United States, and inland chiefly in the Gulf States. It has bluish-black fur, a pointed nose, and big ears. It is cleaner and not as fierce as the brown rat but more suspicious and harder to trap. It is an acrobatic beast. It can rapidly climb a drapery, a perpendicular drain or steam-heat pipe, an elevator cable, or a telephone or electric wire. It can gnaw a hole in a ceiling while clinging to an electric wire. It can run fleetly on a taut wire, or on a rope whether slack or taut. It uses its tail, which is slightly longer than its body, to maintain balance. It nests in attics, ceilings, and hollow walls, and in the superstructures of piers, away from its enemy, the ground-loving brown rat. Not all piers are infested; a few of the newer ones, which are made of concrete, have none at all. It keeps close to the waterfront, and until recently was rarely come across in the interior of the city. Whenever possible, it goes aboard ships to live. While docked here, all ships are required to keep three-foot metal disks, called rat guards, set on their hawsers and mooring cables. These guards sometimes get out of whack – a strong wind may tilt them, for example – and then a black or an Alexandrian can easily clamber over them. Occasionally a rat will walk right up or down a gangplank. It is almost impossible to keep a ship entirely free of them. Some famous ships are notoriously ratty. One beautiful liner – it was in the round-the-world cruise service before the war – once came in with two hundred and fifty aboard. Public Health Service officials look upon a medium-sized ship with twenty as excessively infested. The record for New York Harbor is held by a freighter that came in from an Oriental port with six hundred, all blacks and Alexandrians. The black and the Alexandrian are very much alike, and the untrained eye cannot tell them apart. The Alexandrian is frequently found on ships from Mediterranean ports. It is a native of Egypt, and no one seems to know, even approximately, when it first appeared in this country. It has never been able to get more than a toehold in New York, but it is abundant in some Southern and Gulf ports.
The brown rat, the R. norvegicus, originated somewhere in Central Asia, began to migrate westward early in the eighteenth century, and reached England around 1730. Most authorities believe that it got to this country during the Revolutionary War. From ports all along the coast it went inland, hot on the heels of the early settlers, and now it thrives in every community and on practically every farm in the United States. Its spread was slowest in the high and dry regions of the West; it didn’t reach Wyoming until 1919 and Montana until 1923. Its nose is blunt, and its ears are small and alert, and its eyes are sharp and shiny and joyless and resentful and accusing. Its fur is most often a grimy brown, but it may vary from a pepper-and-salt gray to nearly black. Partial albinos occasionally show up; the tame white rat, which is used as a laboratory animal and sometimes kept as a pet, is a sport derived from the brown.
In addition to being the most numerous, the brown rat is the dirtiest, the fiercest, and the biggest. ‘The untrained observer,’ a Public Health Service doctor remarked not long ago, ‘invariably spreads his hands wide apart when reporting the size of a rat he has seen, indicating that it was somewhat smaller than a stud horse but a whole lot bigger than a bulldog. They are big enough, God protect us, without exaggerating.’ The average length of adult brown rats is ten inches, not counting the tail, which averages seven inches. The average weight is three-quarters of a pound. Once in a while a much heavier one is trapped. One that weighed a pound and a half and measured twenty and a half inches overall (that is, counting the tail) was recently clubbed to death in a Manhattan brewery; brewery and distillery rats feed on mash and many become obese and clumsy. Some exterminators have maintained for years that the biggest rats in the country, perhaps in the world, are found in New York City, but biologists believe that this is just a notion, that they don’t get any bigger in one city than they do in another. The black and the Alexandrian are about two-thirds the size of the brown.
The brown rat is distributed all over the five boroughs. It customarily nests at or below street level – under floors, in rubbishy basements, and in burrows. There are many brownstones and red-bricks, as well as many commercial structures, in the city that have basements or sub-basements with dirt floors; these places are rat heavens. The brown rat can burrow into the hardest soil, even tightly packed clay, and it can tunnel through the kind of cheap mortar that is made of sand and lime. To get from one basement to another, it tunnels under party walls; slum-clearance workers frequently uncover a network of rat tunnels that link all the tenements in a block. Like the magpie, it steals and hoards small gadgets and coins. In nest chambers in a system of tunnels under a Chelsea tenement, workers recently found an empty lipstick tube, a religious medal, a skate key, a celluloid teething ring, a belt buckle, a shoehorn, a penny, a dime, and three quarters. Paper money is sometimes found. When the Civic Repertory Theatre was torn down, a nest constructed solely of dollar bills, seventeen in all, was discovered in a burrow. Exterminators believe that a high percentage of the fires that are classified as �
��of undetermined origin’ are started by the brown rat. It starts them chiefly by gnawing the insulation off electric wires, causing short circuits. It often uses highly inflammable material in building nests. The majority of the nests in the neighborhood of a big garage, for example, will invariably be built of oily cotton rags.
The brown rat is as supple as rubber and it can squeeze and contort itself through openings half its size. It has strong jaws and long, curved incisors with sharp cutting edges. It can gnaw a notch big enough to accommodate its body in an oak plank, a slate shingle, or a sun-dried brick. Attracted by the sound of running water, it will gnaw into lead pipe. It cannot climb as skillfully as the black and the Alexandrian, it cannot jump as far, and it is not as fleet, but it is, for its size, a remarkable swimmer. A Harbor Police launch once came upon three brown rats, undoubtedly from New Jersey, in the middle of the Hudson; in an hour and twenty-five minutes, swimming against the wind in tossing water, they reached the pilings of one of the Barclay Street ferry slips, where the policemen shot them. The brown rat is an omnivorous scavenger, and it doesn’t seem to care at all whether its food is fresh or spoiled. It will eat soap, oil paints, shoe leather, the bone of a bone-handled knife, the glue in a book binding, and the rubber in the insulation of telephone and electric wires. It can go for days without food, and it can obtain sufficient water by licking condensed moisture off metallic surfaces. All rats are vandals, but the brown is the most ruthless. It destroys far more than it actually consumes. Instead of completely eating a few potatoes, it takes a bite or two out of dozens. It will methodically ruin all the apples and pears in a grocery in a night. To get a small quantity of nesting material, it will cut great quantities of garments, rugs, upholstery, and books to tatters. In warehouses, it sometimes goes berserk. In a few hours a pack will rip holes in hundreds of sacks of flour, grain, coffee, and other foodstuffs, spilling and fouling the contents and making an overwhelming mess. Now and then, in live-poultry markets, a lust for blood seems to take hold of the brown rat. One night, in the poultry part of old Gansevoort Market, alongside the Hudson, a burrow of them bit the throats of over three hundred broilers and ate less than a dozen. Before this part of the market was abandoned, in 1942, the rats practically had charge of it. Some of them nested in the drawers of desks. When the drawers were pulled open, they leaped out, snarling.
So far, in the United States, the bubonic plague has been only a menace. From 1898 to 1923, 10,822,331 deaths caused by the plague were recorded in India alone; in the United States, in this period, there were fewer than three hundred deaths. The plague first occurred in this country in 1900, in the Chinatown of San Francisco. It is generally believed that the bacteria were brought in by infected rats that climbed to the docks from an old ship in the Far Eastern trade that caught afire while being unloaded. This epidemic killed a hundred and thirteen people and lasted until the end of 1903. The plague broke out again in 1907, a year after the earthquake. In the same year there was an epidemic in Seattle. There have been two epidemics in New Orleans – one in 1914 and one in 1919 and 1920 – and there was one in Los Angeles in 1924 and 1925. Since then there have been only sporadic cases. However, there is a vast and ominous reservoir of plague infection in the rural rodents of the West. During the first epidemic in San Francisco, many rats fled the city and infected field rodents, chiefly ground squirrels, in the suburbs. In 1934, thirty years later, Public Health Service biologists turned up the fact that the plague had slowly spread among burrowing animals – ground squirrels, prairie dogs, chipmunks, and others – as far east as New Mexico and Wyoming. Late last year it appeared fifty miles inside the western border of North Dakota. Public Health Service officials say that there is no reason to assume that the infection will not infiltrate into rodents of the Great Plains, cross the Mississippi, and show up in the East. Most of the diseased rodents inhabit thinly settled sections and come in contact with human beings infrequently. Even so, every year several people, usually hunters, are bitten by infected rodent fleas and come down with the plague. There is an ever-present possibility that a few infected rodents may stray from rural areas and communicate the disease to town and city rats. If the disease ever gets loose among city rats, epidemics among human beings are apt to follow.
There has never been an outbreak of the plague in New York. There have, however, been two narrow escapes. In 1900, plague-infected rats were found in ships in the harbor of New York, as well as in the harbors of San Francisco and Port Townsend, Washington. They got ashore only in San Francisco, causing the first Black Death epidemic in North America. Plague rats were found in New York Harbor for the second time early in January of 1943. Among themselves, health officials refer to this discovery as ‘the Wyoming matter.’ The history of the Wyoming matter was told to me in 1944 by Dr Robert Olesen, medical director of the New York Quarantine Station of the Public Health Service. Mr Holsendorf sent me to see Dr Olesen; they were colleagues years ago in the Public Health Service and are old friends. I saw Dr Olesen in his office in an old, red-brick building overlooking the Narrows, in Rosebank, on Staten Island.
‘The Wyoming matter has been one of the best-kept secrets in the history of the Public Health Service, and I’m proud of that,’ Dr Olesen said, ‘but I agree with what Ben Holsendorf has been saying lately – there’s no reason at all to keep it secret any longer. I’ll tell you about it.
‘First of all, I’d better explain how we inspect ships. Every ship in foreign trade that comes into the harbor is boarded by a party made up of a customs officer, an immigration officer, a plant-quarantine man from the Department of Agriculture, a Public Health doctor, and a sanitary inspector, whose main job is to determine the degree of rat infestation aboard. While the doctor is examining the crew and passengers for quarantinable diseases, the sanitary inspector goes through the ship looking for rat tracks, gnawings, droppings, and nests. Rats have a smell that is as distinctive as the smell of cats, although not as rank, and an experienced inspector can detect their presence that way. The inspector pays particular attention to ships that have touched at plague ports. There are quite a few of these ports right now; Suez had an outbreak the other day and was put on the list. After he’s made his search, he reports to the doctor, who orders a fumigation if things look bad. If infestation is slight and if the ship comes from a clean port, the doctor probably won’t insist on a fumigation. I won’t give you any wartime figures, but in one peacetime month, for example, we inspected five hundred and sixty ships, found that a hundred and thirty-two were infested to some degree, and fumigated twenty-four, recovering eight hundred and ten rats.
‘We’ve been short-handed since the war began, and most of our fumigating is done by a group of twenty-two Coast Guardsmen. They were assigned to us early in the war and we trained them to make rat inspections and fumigations. We use hydrocyanic gas, which is one of the most lethal of poisons. An infested ship is anchored and a fumigation party of four or five Coast Guardsmen goes aboard. First, they send the entire crew ashore, carefully checking them off one by one. Then one of the Coast Guardsmen goes through the ship, shouting, banging on bulkheads with a wrench, and making as much racket as possible. He shouts, “Danger! Fumigation! Poison gas!” Then the Coast Guardsmen put on gas masks and toss some tear-gas bombs into the holds. That’s to fetch out any stowaways who might be aboard. During the first months we used hydrocyanic, we killed a number of stowaways. A few weeks ago, in the hold of a South American freighter, the tear gas brought out eight weeping stowaways who had been hiding in an empty water tank. Two fellows in the crew had smuggled them aboard in Buenos Aires and had been feeding them. These fellows had kept their mouths shut and gone ashore, leaving the stowaways to be killed, for all they cared. When the Coast Guardsmen are satisfied a ship is empty of human beings, they seal the holds and cabins and open cans of hydrocyanic, liberating the gas. They even fumigate the lifeboats; rats often hide in them. After a certain number of hours – ten for a medium-sized ship – the holds are ope
ned and aired out, and the Coast Guardsmen go below and search for dead rats. The rats are dropped in wax-paper bags and brought to a laboratory in the basement here. They are combed for fleas. The fleas are pounded in a mortar, put into a solution, and injected into guinea pigs. Then the rats are autopsied, and bits of livers and spleens are snipped out and pounded up. These are also put into a solution and injected into guinea pigs. If the fleas or the rats are infected, the pigs sicken and die. We began this work in 1921, and for twenty-two years we injected scores of generations of pigs with the fleas and livers and spleens of rats from practically every port in the world without turning up a single Black Death germ. We didn’t want to find any, to be sure, but there were days when we couldn’t help but look upon our work as routine and futile.
‘Now then, late in the evening of January 10, 1943, the French freighter Wyoming arrived from Casablanca, North Africa, with a miscellaneous cargo, mainly wine and tobacco. A big convoy came in that evening, sixty or seventy ships, and we didn’t get to the Wyoming until next day. Casablanca was on the plague list at that time; there had been an outbreak in December, shortly before the Wyoming sailed. The crew was carefully examined. No sign of illness. Then the captain brought out a deratization certificate stating that the ship had recently been fumigated – in Casablanca, if I remember correctly – and was free of rats; looking back, I feel sure the official who signed this certificate had been bribed. She was allowed to dock at Pier 34, Brooklyn, where she discharged some bags of mail. Next day she proceeded to Pier 84, Hudson River, and began discharging her cargo. Some rats were seen in her by longshoremen, and on January 13th we went over her and found evidence of infestation. She was allowed to continue unloading. On January 18th we fumigated her right at her dock and found twenty rats. We combed and autopsied the rats, and inoculated a guinea pig. Four days later the pig sickened and died. An autopsy indicated plague infection and cultures from its heart blood showed an oval organism which had all the characteristics of Pasteurella pestis. We made a broth of tissue from this pig and inoculated a second pig. It sickened and died. It was the Black Death, no doubt about it. We had found it in the harbor for the first time in forty-three years.
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