Clare's "Bonny Mary O!" begins with a robin singing by the dairy and ends with the promise of a kiss, and the whole poem is a walk between the two. Over six stanzas the day slides from "the morning opens fine" to "evening's mellow skies", following the round of a milkmaid's work. Only in the last stanza does the speaker step out from behind his own observations to say "I will meet thee there." Until then he has simply been describing the world around Mary, so thoroughly that she and it start to seem inseparable. The central idea is that love here is neither set against the countryside nor merely decorated with it. It grows out of the same ground as the cowslips and the cud-chewing cow.
The form is built like a song. Every stanza opens with two short lines that end on the refrain "bonny Mary O!", then stretches into a longer, tumbling line before the refrain returns. The short lines rhyme gently, with Mary and dairy in the first stanza and wing and spring in the second. The long lines carry their own rhymes inside them: "wrens" and "hens", "unfold" and "gold", "dwells" and "shells". The result is a lilting, almost skipping rhythm. The rhyme loosens only once, to the near-miss of "food" and "cud", as if the cow's slow chewing had dulled the beat. The repeated "O!" works like a sung exclamation, and the name returns so often that Mary seems to be present in every image, even when she is not mentioned.
Clare's details are sharp and unsentimental. His wrens "cock their tails among the hens", a picture drawn from the farmyard rather than from a postcard. The cowslips are not just pretty. They "make the milk so sweet", which links the flowers to Mary's work. Gold then runs through the poem like a thread: the cowslips' "tassels all of gold", then the yellowhammer hiding "her golden breast". The nest stanza is the strangest and most tender. The eggs are "mystic", with "strange writing on their shells", and the poet treats their scribbled markings as a secret script that only patient watching could discover. The nest is "hid in the mossy grass", and the word "hid" is worth remembering when the last stanza arrives.
The evening stanzas slow everything down. The cow feeds along "the clear brook fringed with rushes", and her grazing is tied directly to "the evening pail", so the landscape and the milking become one process. Then comes the poem's finest image, the cowpond that "lies dimpled like thy sen". "Sen" is dialect for "self", and the comparison is unusual. Mary is not likened to a flower or a jewel but to the surface of water, rippled and smiling. Above it, "the gnat swarms fall and rise", a movement that feels like breathing, while dragonflies sleep on the flags. The poem has been moving towards stillness, and the scene is ready for something to happen.
What happens is a change of pronoun. Through five stanzas the world is "the" this and "the" that, observed from a distance. In the last, the speaker arrives with "I", turns to "thee", and offers to be "thine own for aye". His promise to kiss her "on the grass" quietly echoes the "mossy grass" where the yellowhammer's eggs lie hidden. The lovers' meeting is placed among the hidden, private, living things the poem has been noticing all along. Judging by the imagery, his desire seems to come from the attention he has paid, so that noticing the world and loving Mary are almost the same act.
That is what makes the poem worth reading. Clare is remembered as one of the great poets of English rural life, and here his authority comes from precision rather than grand statement. Words like "agen" and "sen" keep a local voice in the verse instead of polishing it away. The poem asks us to believe that a dairymaid's morning, a bird's nest and a village pond are fit subjects for love poetry, and by the end it has made the case without once raising its voice.