Mouse in the house
A mouse indoors keeps to the walls because open floor feels dangerous, and the sight can make you notice where you hug the edges yourself. In old New England, a house overrun with mice meant mischief was brewing.
What it may mean
Watch a mouse cross a kitchen and it almost never takes the shortest route. It runs along the baseboard, under the cabinets, behind the trash can, keeping one side of its body against a wall where it feels safer, and only dashes into the open when it has to. Biologists even use this habit to measure how anxious a mouse is. People do something similar at parties, in meetings, in new neighborhoods: we keep to the edges, near the door, close to the one person we know. That is not always wrong, but it is worth noticing where you take the long way around the middle of the room, and what it would cost you to cross it once.
Depending on how you saw it
Running along the baseboard
A mouse that streaks along the wall and vanishes under the stove is following the route it trusts, the same one every night. Familiar paths feel safe even when they are long. Which of your routes, on the job or in the house, have you never questioned simply because they feel safe?
Scratching inside the wall at night
In a silent house, one mouse in the wall can sound like something much larger. The dark and the hollow space make the noise grow. Which worry has been sounding bigger at night than it really is?
Caught in a humane trap
A mouse in a live trap looks up at you with very little fear and a lot of curiosity. Released close to home, it often finds its way back, so people release it far from the house. Which goodbye of yours needs more distance before it can really stick?
A nest in the car or the garage
In cold months, mice move into engines, glove boxes and garage shelves, building nests from insulation and paper. They pick warm, still, rarely opened spaces. Which drawer or shelf of your life has gone unopened long enough for something to move in?
Why it happens in nature
The house mouse can squeeze through a gap about the width of a pencil and climbs, jumps and swims well. Mice move inside when the weather turns cold, are most active at night and prefer to run along walls, where they feel safer than on open floor. Sealing gaps around pipes, vents and doors is the main way to keep them out.
What folk beliefs say
New England
When a house was quite overrun with rats or mice, New England Yankees would say: "Some pesky mischief is a-brewin'."
Source: Cora Linn Daniels; C. M. Stevans (eds.), Encyclopaedia of Superstitions, Folklore, and the Occult Sciences of the World, vol. 2 (1903), vol. 2, p. 683. View the page
England (Yorkshire)
A Yorkshire rhyme about quaking grass, locally called "trembling jockies," promised that with one of them in the house, you would not have a mouse.
Source: Cora Linn Daniels; C. M. Stevans (eds.), Encyclopaedia of Superstitions, Folklore, and the Occult Sciences of the World, vol. 2 (1903), vol. 2, p. 834. View the page
Sweden
In Sweden it was thought unlucky to speak of rats, mice or other vermin at Easter, because they would then swarm through the house all year.
Source: Cora Linn Daniels; C. M. Stevans (eds.), Encyclopaedia of Superstitions, Folklore, and the Occult Sciences of the World, vol. 2 (1903), vol. 2, p. 683. View the page
To reflect on
Where do you keep to the edges of the room, and what would it cost to cross the middle once?