The speaker is a bird watcher who seems to be walking out into early summer with everything they've ever known tucked inside them. The "places" they carry are compared to "plain victuals", simple food packed for a journey, so memory becomes something ordinary and nourishing rather than grand. Their head is "full of light," which gives a sense of openness and quiet happiness.
Then the speaker turns to the birds. "Oh martin / oh starling" reads like a gentle call or a blessing, asking them to "whistle the best life." There is warmth in that wish, but also a little distance. The last lines place the birds in fields "where nobody / comes flying," which suggests an empty, unhurried landscape, perhaps a freedom the speaker admires or longs for.
The mood is calm, light, and slightly wistful. Nothing dramatic happens. The poem simply lingers in a moment of watching, remembering, and wishing the birds well.