The speaker is calling out to someone dear — Bonnie Mary — and urging her to take a day off with him in Newport, a town beside the River Tay. The whole poem is a warm-hearted invitation, full of fond excitement. He’s clearly someone who spends long hours in a workshop and longs for fresh air and open sky. His mood is eager and affectionate, as if the holiday will be a tonic for them both.
What follows is a gentle, meandering tour of the place. He points out grand houses with ivy and green shrubbery, birds and butterflies rising up, bees humming from flower to flower. Everything is seen through the eyes of a person who’s been pent up indoors and now drinks in every cheerful detail. The poem creates an almost childlike sense of pleasure — safe, simple, and nostalgic. Even the thought of returning home at sunset isn’t a letdown, because the day’s ramble will stay with them in their dreams.