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1[[quoteright:300:https://static.tvtropes.org/pmwiki/pub/images/frisby_001_9850.jpg]]
2
3->''"You must go, Mrs. Frisby, to the rats under the rosebush. They are not, I think, like other rats."''
4-->-- '''The Owl'''
5
6'''This page is about the book ''Mrs. Frisby and the Rats of NIMH''. If you are looking for the article about the animated film, see ''WesternAnimation/TheSecretOfNIMH''.'''
7
8A 1971 novel by Robert C. O'Brien about [[UpliftedAnimal lab rats]] that gained human intelligence through a series of top secret government experiments.
9
10The protagonist of the story, Mrs. Frisby, is a [[IntellectualAnimal fairly intelligent]], but otherwise ordinary field mouse. Mrs. Frisby seeks a way to keep her sick son, Timothy, alive during the spring plowing. He is too weak to move to their summer home without risking his death, but staying would mean certain death because their winter home lies directly in the path of the farmer's tractor. In order to ensure her son's survival, Mrs. Frisby seeks the help of the elusive [[UpliftedAnimal uplifted]] rats of NIMH (National Institute of Mental Health).
11
12The first and last third of the book are told from the (third person limited) perspective of Mrs. Frisby while the middle third is a long flashback, narrated by Nicodemus. The sections of the book focusing on Mrs. Frisby are concrete and down-to-earth: the humble realities of a humble creature trying to save her family. The animals in that section are [[AnthropomorphicShift anthropomorphized]] quite a bit and all of them are rather [[IntellectualAnimal intelligent]], even without being uplifted. Nicodemus's chapters are quite different in tone, almost to the point of MoodWhiplash. His chapters deal with their escape from NIMH and his intellectual journey afterward, and the animals in this chapter [[SlidingScaleOfAnthropomorphism are less human]] than those of Mrs. Frisby's. If read separately you would be forgiven for thinking it was from a different story. The NIMH chapters examine animal intelligence, the psychological [[WhatMeasureIsANonHuman differences and similarities between humans and rats]], UsefulNotes/TheScientificMethod, and the philosophical ramifications of [[ShouldntYouStopStealing stealing]].
13
14It was written in [[TheSeventies 1971]] and made into a very loosely adapted [[AnimatedAdaptation animated feature-length film]] called ''WesternAnimation/TheSecretOfNIMH'' by celebrated director Creator/DonBluth. After O'Brien's death, there were a couple of semi-official [[{{sequel}} sequels]] written by his daughter, Jane Leslie Conly -- ''Racso and the Rats of NIMH'' (1986) and ''R-T, Margaret, and the Rats of NIMH'' (1990).
15----
16!!Tropes:
17
18* AcronymsAreEasyAsAybeecee: Mrs. Frisby and many of the other creatures do not know what exactly NIMH is other than it being the place the rats are from. Nicodemus explains to her that it's short for the National Institute of Mental Health, where the rats were subjected to medical experiments that increased their intelligence.
19* AirVentPassageway: The rats use the air vents to escape NIMH. It's portrayed realistically with the rats spending over a week exploring the vents with a spool of thread before they know the way out well enough to escape. Rats of course, are also much smaller, lighter and make less noise than humans, which makes the trope more plausible in that respect as well. Even things like the fans used to provide air movement are taken into account. They're not giant and looming, but the strong wind they provide actually blows away lighter animals into other passages and ducts where they can't be reached or even found. The mesh on outside of the vent to prevent debris from entering the ducts provides a significant obstacle, as well, as the rats have much trouble removing it from the inside and are only able to pry open a small enough hole for mice to fit through.
20* AmplifiedAnimalAptitude: The relative intelligence of ordinary animals presented here is an interesting thought. The non-uplifted animals aren't as dumb as the scientists at NIMH would have thought, though the NIMH experiments did help the rats grow even more. As an example, Mrs Frisby may understand concepts of marriage, moving or eating something to make you better, but she doesn't know how to actually make the medicine, work a cage door or even a light switch--things the uplifted animals show they have learned.
21** It is mentioned Jonathan managed to teach her to read but only through a lot of work, and she still isn't that good at it. Which, however, he learns perfectly as an uplifted NIMH subject.
22* AnimalTalk: The animals can talk to each other, but can't talk to humans.
23* AnthropomorphicShift: The chapters in the original book involving Mrs. Frisby have animals that are more anthropomorphic than the ones involving the rats of NIMH. Ordinary rodents are seen using tools and can understand some very human concepts without much difficulty. It's possible that this is because the NIMH chapters are from the rats' perspective while the rest are from relatively normal Mrs. Frisby's perspective. One would expect Mrs. Frisby to see her fellow non-uplifted animals as being fairly bright.
24* {{Arcadia}}: What the rats eventually want to live in.
25* ArtisticLicenseLinguistics: Mrs. Frisby and her children are referred to as "field mice". The term "field mouse" actually refers to the eastern meadow vole, which is not a mouse at all. It would be impossible for an escaped laboratory mouse to breed with one. The story never portrays her as anything other than a mouse, and the illustrations of her clearly show a mouse and not a vole, so the author probably just made a mistake in terminology.
26* BuriedTreasure: By field mouse standards, the stash of food Mrs. Frisby finds is this.
27* BusCrash: A splinter group of rats, which includes [[spoiler: Jenner]], is killed by an accident at a hardware store. Said group departed even before the main storyline; the event is only described by some tertiary characters and is never shown.
28* CarnivoreConfusion:
29** The owl declines to eat Mrs. Frisby, and even gives her advice on how to save her son.
30** Mrs. Frisby's neighbor and apparent friend is a shrew, and shrews also eat mice. So do crows.
31* CatsAreMean: Dragon. A recurring saying among the animals is, ''"We all help one another against the cat."'' Even the ''owl'' goes by this.
32* CleverCrows: Jeremy is a very useful and helpful crow despite his young and inexperienced nature. He helps Mrs. Frisby when she needs help, unlike his [[WesternAnimation/TheSecretOfNIMH animated version]]. In the book, Jeremy is shown as someone more smart.
33* DidntThinkThisThrough: Let's capture some rats and make them hyper intelligent. Then we should make cages that they can physically open and then put written instructions on how to open the cages on them. And heck, while we're at it we should also teach them how to read.
34* ElaborateUndergroundBase: The rats have one of these, complete with electricity, machinery and running water stolen from the humans that live nearby.
35* EvenEvilHasStandards: The old owl who lives deep in the forest preys on rodents, and could most likely make short work of a cat, but he is ''still'' of the opinion that [[CatsAreMean Dragon]] is something that animals should help each other out against (although he might be choosing to help small animals avoid the cat so that ''he'' can eat them later, once he's actually hungry...) The owl also has a [[SacredHospitality personal sense of hospitality]] that prevents him from harming visitors in his home, no matter how edible.
36* EscapedFromTheLab: The uplifted rats and mice, naturally, which kickstarts the whole story.
37* ExactEavesdropping: While held captive by the humans, Mrs. Frisby just happens to overhear a conversation about 'mechanized rats' killed trying to steal a motor, and how some scientist type is interested in coming to see the farm's rat colony.
38* EyeScream: Nicodemus lost his eye some time in the past. What exactly happened is never explained.
39* EyepatchOfPower: Nicodemus wears one; subverted by it not being a scar of combat, but of a mundane injury--one that, by his own admission, significantly impaired the eyesight in his "good" eye as well as rendering the other eye completely blind.
40* {{Foreshadowing}}: It's mentioned that while Jonathan did teach Mrs. Frisby about reading, she struggles with it even in the present day. Meanwhile, their kids easily took to the skill. This hints to Jonathan's past as an experimented lab mouse prior to meeting his far more normal mate.
41* GeneticEngineeringIsTheNewNuke: The Rats and mice at NIMH were given a cocktail of unspecified DNA and steroids which increased their learning capacity and speed by a factor of 1000% and almost completely halted their aging. Quite prescient and unusual for a work set dab smack in the middle of the UsefulNotes/{{ColdWar}}.
42* GoneHorriblyRight: The result of the experiment on the rats and mice of NIMH -- the rats became strong and smart enough to revolt.
43* HiddenElfVillage: The rats' colony in Thorn Valley is fully intended to be this in order to avoid capture and/or extermination while also serving as the basis for the future uplifted rat civilization.
44* HouseSquatting: The titular rats take shelter in a luxurious mansion called the Boniface Estate not long after escaping from NIMH. The owners of the mansion are wealthy newlyweds who went on a trip around the world, leaving the estate unoccupied. The rats take caution not to be discovered by the groundskeeper who maintains the lawn and garden; they hide during his visits, clean the house, and haul their garbage far off into the nearby woods to avoid detection.
45* HumansAreTheRealMonsters: Rats see humans like this in a way, because of their vehement and [[FantasticRacism perhaps irrational hatred of rats]], and sticking them with needles and shocking them through their feet. Over time though they take on a more mature outlook of [[HumansAreFlawed humans being somewhat foolish with how they use technology]] while also recognizing that they themselves have fallen into some of the same pitfalls.
46* ImmortalityBeginsAtTwenty: The offspring of the laboratory-altered rats of NIMH all age at a normal rate for a rat. If they do exhibit the longevity of their parents, it will be the kind that begins at sexual maturity. On the other hand and depending on how you interpret the text, mice exhibit the extended lifespan (perhaps to a lesser extent) from day one. Mrs. Frisby's children are still children at over a year old, a fact that goes [[ElephantInTheLivingRoom unremarked by their mother]].
47* InexplicableLanguageFluency: The animals can understand humans and each other, but can't talk to humans. This leads to a bit of FridgeLogic as to where exactly all these animals picked up English (justified for the rats, as they were taught it in the lab, but not for any of the others), and whether they can understand other human languages automatically as well.
48* InformedFlaw: The unintelligence of non-NIMH experimented animals for one.
49* IntellectualAnimal: The entire cast.
50* KansasCityShuffle: When the NIMH agents come to bulldoze the rosebush on the Fitzgibbon farm, the rats don't defend, fortify or fight for their nest. The rats allow NIMH to destroy their base, but they dig an extra tunnel leading into the forest and use it to evacuate all the rats before NIMH arrives. They then task a handful of rats to run ''back'' into the nest through the tunnel, escape through the main entrance, and then run back into the tunnel and out again. This leads the exterminators to believe that they have killed or at least scattered a large number of rats, even though they only saw the same six or seven over and over again. On top of this, the rats destroyed their ElaborateUndergroundBase before they evacuated, so that it resembled an ordinary rat's nest. The net outcome was that even though the rats lost their former home, it caused NIMH to mistakenly believe they had taken care of the rat problem and that the rat escapees weren't very intelligent to begin with.
51* LamarckWasRight: Justified. The book is actually very good about this. The injections given to the rodents at NIMH to enhance intelligence altered their DNA, and thus the UpliftedAnimal trait was passed on to the next generation. The injection to increase lifespan was steroid based, and therefore the rats are uncertain if the effects will be inherited. If they are indeed, then it's a case of ImmortalityBeginsAtTwenty for the younger generation because they have up until that point at least grown up at a normal rate of aging.
52* LifeImitatesArt: While NIMH has long since stopped experimenting on rats and mice since the book was written, other institutes have continued with the work up to and including [[https://www.nationalgeographic.com/animals/article/rat-intelligence-memory-news-animals increasing the intelligence of rats via gene-editing]] and [[https://www.theguardian.com/science/2023/feb/08/anti-ageing-scientists-extend-lifespan-of-oldest-living-lab-rat prolonging their lifespan via blood transfusion]].
53* MakeItLookLikeAnAccident: Non-lethal version -- when the rats free Mrs. Frisby from the birdcage, they loosen the door hinges to make it look like she pushed her way out on her own (rather than open the lock directly, which she would never be able to do).
54* MalignantPlotTumor: The B plot giving the backstory of the rats of NIMH, which is easily the [[Administrivia/TropesAreTools best-written and most fascinating part of the book]].
55* MarriedAnimals: Mrs. Frisby is a normal-enough mouse living in a MouseWorld. She was married, but is now a widow.
56* MayflyDecemberRomance: Subverted. The experimental treatment given to Jonathan Frisby greatly increased his lifespan, and potentially those of his offspring as well. He would have outlived his wife by quite a number of years, had he not been [[PosthumousCharacter killed by Dragon the cat before the start of the story]].
57* SlidingScale/MohsScaleOfScienceFictionHardness: Between 5 and 6 since real-life science has caught up to the book insofar as genetic and biochemical experiments on rodents are now all but standard. Super-intelligent and immortal rodents are however still some ways away though.
58* MostWritersAreHuman: The anthropomorphic qualities of the rats of NIMH can be excused due to their greater intelligence and time spent with humans, but even ordinary animals tend to act a lot like people. Mrs. Frisby occasionally mentions marriage and the proper age to marry as if they applied to her, and other rodents in general. The shrew even refers to "the summer of sixty-five", as if animals could recognize specific years.
59* MouseWorld: The story centers primarily around mice and rats, so naturally.
60* MrExposition: Nicodemus.
61* NamesToRunAwayFromReallyFast: Dragon, the cat, if you're a mouse.
62* NoControlGroup: Averted.
63* ObfuscatingStupidity: The rats of NIMH must exhibit this and pretend to be [[TheMasquerade ordinary rats]] at all times, lest their intelligence lead to discovery and recapture. When moving out of their ElaborateUndergroundBase, they go to great pains to disguise it as an ordinary rat's nest. They move out all the machinery, destroy all the fancy architecture and fill the whole base with garbage. This was a rush job, and given enough time they would have even destroyed the machinery. In another instance Justin declines to release Mrs. Frisby from a birdcage the conventional way. Instead he opts to disguise her escape as a flaw of the cage rather than opening it deliberately.
64* TheOwlKnowingOne: The Owl tells Mrs. Frisby to get help from the rats. He can also envision his own death. When Mrs. Frisby asks why he doesn't just fly away and escape his failing home, he explains that it's all he's ever known, and "When this tree falls I shall fall with it."
65* PrecociousCrush: Mrs. Frisby’s daughter Isabella's crush on Justin.
66* ResourcefulRodent: The story is about a group of lab rats that gained human intelligence through a series of top secret government experiments.
67* RodentsOfUnusualSize: While the rats of NIMH are nowhere near enormous, they are much bigger than ordinary rats and in fact Mrs. Frisby describes the rat Brutus as being close in size to a tomcat.
68* SacredHospitality: The Owl eats mice all the time, but when Mrs. Frisby comes to his home to ask his advice he treats her as a guest and does her no harm.
69* SequelHook: Martin pledges to visit the valley where the rats end up settling one day, possibly with the help of Jeremy the crow. Sadly this was unable to be realized by the original author because of his untimely death.
70* UsefulNotes/TheScientificMethod: Shown accurately in the first book. They even use a [[NoControlGroup control group]]! (But it's not double blind.)
71* ShouldntYouStopStealing: Nicodemus and the vast majority of rats recognize that stealing electricity and such is highly conspicuous and will only get more conspicuous as their population increases. They've even discovered a way to live [[TakeAThirdOption without having to hijack resources from humans]], but it would be harder and less comfortable at first. A dissenting group doesn't fear the repercussions and would rather continue stealing.
72* ShownTheirWork: The section narrated by Nicodemus at least. It's very detailed and accurate about UsefulNotes/TheScientificMethod, [[LamarckWasRight the inherited effects of the experiments]] and the psychology of rats.
73* SomewhereAMammalogistIsCrying: The NIMH scientists use an apparent opening to the outside world as their rat-training "bait" of choice, and the not-yet-uplifted rats frantically rush towards it when they explore the experimental maze. Real rats are cautious animals that ''far'' prefer the shelter and dimness of a tunnel to sunlit open space, where birds of prey or other predators could snatch them up: if anything, they should ''retreat'' from such an exit.
74* SuperSerum: Whatever the combination of DNA and steroids the rats at NIMH received was. And it worked beyond the researchers' wildest dreams.
75* TerminallyDependentSociety: The rats in relation to human technology and foodstuffs. The Plan ultimately aims to make them a self-sustainable civilization.
76* TruthInTelevision: Part of the reason the section about NIMH [[ShownTheirWork is so realistic]] is because the section was inspired an [[http://query.nytimes.com/gst/fullpage.html?res=990CEEDB1E39F93AA1575AC0A963958260&sec=&spon=&pagewanted=print actual series of experiments done on rodents]] at NIMH, which is even an [[http://en.wikipedia.org/wiki/National_Institute_of_Mental_Health actual place]].
77* UpliftedAnimal: The rats of NIMH, Jonathan Frisby and Mr. Ages are all as intelligent as or even more intelligent than humans.
78* WhatHappenedToTheMouse: The six mice who were blown down various air vents at NIMH are never seen or mentioned again.
79* WhatMeasureIsANonhuman: Nicodemus discusses this issue and postulates that human dependency and the lack of tool use are the reasons rats have stagnated in terms of intelligence and civilization. He theorizes that perpetual stealing from humans would just make life too easy and put rats back into a rut where they don't progress at all and live in total dependency on humans.
80* WhereTheHellIsSpringfield: Since NIMH is a real place, the story likely takes place on the east coast of the United States somewhere around Washington, with the oft-mentioned mountains likely being the Appalachians. There even exists a real-life Thorn Mountain in New Hampshire.
81* WritersCannotDoMath: It's not clear if this is an error on the writer's part or on the character's, but Mrs. Frisby noticed that Jeremy was a young crow, only about a year old, but she doesn't notice that her children are over a year old and are still children.

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