Nearly all of Clare's poem describes a summer outing that never happens. For six stanzas the speaker strolls with little Anna through the fields, pointing her toward brooks, ponds and butterflies, and the verse is so light that the reader is carried along. Then the last stanza interrupts: "But thou art on the bed of pain, / So tells each poor forsaken toy." The walk was imagined, conjured by someone who cannot give the child the real thing. The central idea is the distance between the joy a child should have and the suffering she is in, and the way love tries to cross that distance with words.
The opening is built to lull us. "Summer laughs in mirth" makes the season itself a cheerful companion, and the speaker's "we will of the party be" turns the day into an invitation. The soft, repeated m-sounds of "mirth," "merry" and "minstrelsy" make the fields sound like a festival, while the crickets left "in the hearth" are the first sign that the indoor world is being abandoned. Reading back from the ending, that detail is cruel. The real Anna is stuck indoors, and the speaker is trying to get her out by force of imagination.
Look at the verbs and tenses, too. "I see thee now," "Thou'lt leave my hand," "I hear thy simple wonderment": the speaker keeps claiming to see and hear a child who, we learn, isn't there. These lines read as straightforward description until the final stanza turns them into acts of longing. Anna herself is drawn through small, quick gestures. She "catch[es] at each object passing bye" and bolts from the speaker's hand "with eager speed." Calling her "the happiest thing in all the land / Except the bee and butterfly" places her among creatures who are all motion and no worry. The landscape is just as vivid. The brook is "limpid" and "gilt with the summer's burnished gleam," as if the water were beaten metal, and its "crimping stream" suggests a surface rippling into tiny pleats.
The most unsettling image is the willow. It is "danger-daring" and "leans an ancient invalid / Oer spots where deepest waters be." Clare gives this stanza six lines instead of four, so the sentence itself seems to lean out over the water. The word "invalid" is the quiet hinge of the poem. A tree is called an invalid long before we learn the child is one, and the deep water beneath suggests that even the happy outing has danger in it. Judging by the imagery, the speaker's fear is already present before it is named.
The form works the same way. The poem moves in brisk, singsong lines of roughly four beats, rhymed ABAB, the kind of rhythm that suits a toddler. Even the rhyme of "bye" with "butterfly" feels like a nursery game. The pattern frays in the final stanza, which stretches to six lines. The word "hour" in "Ah, could I see that happy hour" has no rhyme partner at all, and it hangs there like the wish itself. Meanwhile "toy," "employ" and "joy" crowd onto one sound, so the abandoned plaything is tied to happiness by rhyme even as it lies unused.
One more detail deserves attention. Describing how Anna chases a bird or bee "to run for what it neer achieves," Clare is noting that a child's delight lies in the chase, not the catch. The same is true of the speaker. The poem ends on the verbs "toddle," "stoop" and "shout," a picture of health that stays out of reach, and nothing in the text tells us whether it comes true.
That restraint is what makes the poem worth reading. Clare says almost nothing directly about illness. A single line and a few forsaken toys carry the whole weight, and the reader supplies the rest. Because the joy before it is so specific, from the pond weed to the shout at some new surprise, the ending hurts in proportion. The poem shows that a wish can be a form of tenderness, and that describing a happy day can be a way of keeping it alive.