Most people see a fly at the window as a nuisance to be swatted or shooed outside. John Clare sees a lodger, a guest, even a relative. His short piece on house flies, which reads as prose rather than verse, argues in a few sentences that these small creatures belong to the household as fully as the people do. The central idea is hospitality, extended to the smallest and most overlooked living thing in the room.
Since there is no rhyme and no regular metre, the piece gets its music from sentence shape and repeated sounds. The sentences are long and loosely stacked, held together by commas, semicolons and "and", so they ramble in the unhurried way of someone watching a window on a summer afternoon. The sibilance is the most noticeable sound pattern: "sunrise," "sunset," "sip," "sugar," "summer," "seem," "seldom." Read aloud, the s-sounds hum faintly, and it is hard not to hear the flies in them.
The word "or" is the hinge of the piece, starting with the title, "House or Window Flies." The flies "look like things of mind or fairies," they seem "pleased or dull," they "creep, fly, or do as they like," they are "small or dwarfish." Each time, Clare offers an alternative rather than a firm definition, as though he would not pin the creatures down even to a single name. The effect matches the content. A text about giving creatures "every liberty" refuses to confine them in language.
The imagery is domestic and tender. Clare's list of what the flies consume has a pleasing rhythm: they "sip of the tea, drink of the beer, and eat of the sugar." The little word "of" after each verb makes the flies sound like polite guests taking a modest portion, and the three-part list gives the sentence a settled, comfortable close. Then comes "and be welcome all summer long," where the verb "welcome" turns the flies from intruders into visitors who have earned their place. The phrase "dancing in the window all day from sunrise to sunset" gives them a whole day's performance. Their erratic flight becomes choreography, and the speaker admits he finds it "entertaining."
The most unusual phrase is "things of mind." It could mean creatures that seem made of thought rather than substance, flickering, weightless and half imagined. Paired with "fairies," it lifts the flies out of the world of pests and into something near enchantment. Yet Clare never lets the fairy language float away from the real. The flies also respond to the "weather," pleased on bright days and "dull" on gloomy ones, and the human-sounding moods make them easy to sympathise with.
The social detail is just as telling. The flies live "in cottages and halls," and are tolerated in "clean cottages and genteel houses" alike. They cross the boundary between poor and grand households without being stopped, which quietly suggests that the hierarchies people care about mean nothing to them. Clare was the son of a farm labourer, and the poem's levelling instinct may be worth noticing, though the text itself never makes that connection and it is safest to treat it as a suggestion only.
The ending carries the argument. The flies are "the small or dwarfish portion of our own family," and then "fairy familiars that we know and treat as one of ourselves." The word "familiars" echoes "family" and also recalls the old idea of a familiar as a spirit that attends a household. Clare keeps the sense of the uncanny but makes it friendly and ordinary. The closing phrase "one of ourselves" sets the flies on the same level as us, and the piece stops there without any moral flourish.
What makes the passage significant is its quiet radicalism. It asks the reader to pay attention to what is smallest and most taken for granted, and it does so with affection rather than sentiment. Even the claim that the flies "seldom or ever do wrong" is gently comic, since it is a generous verdict that a reader might want to argue with and yet can hardly resist. In this short piece Clare treats the natural world as part of the family circle, and asks us to share the window with the flies.