The poem opens with a small, quiet loss: the road home "went off and ended." It doesn't say the speaker is lost or even upset. The road just runs out, and the plain wording makes that feel final and a little strange, as if home has become unreachable, or maybe no longer exists in the way it once did.
What follows is a sudden shift. The speaker says a kingfisher is their "other self," dressed in "an old felt suit." The image is odd and a little funny: a bright, quick bird wearing shabby clothes. It suggests someone worn down and unfashionable, yet still lively and watchful. The final line, "I eat and go," is blunt and restless. There's no settling down, only taking what's needed and moving on.
The mood is wry, lonely, and oddly free. The poem, judging by its title, plays with the idea of a wanderer who is "king" of a road that leads nowhere in particular, finding a kind of dignity in that.