Its a poem by Kipling called "Brooklyn Road" I think its either from "Rewards and Fairies" or "Puck of Pooks Hill"

It recounts how the singer meets a fairy on the road and falls in love with her. There's quite a good version sung by Charley Yarwood and Ian Woods on their Hooks and Nets album

if you can't find it, post back and I will transcribe it from my "Complete Works" (though I'm away till Monday - sorry)