The first album by Richard and Linda Thompson remains not only one of their two best, but also one of the most enduring artifacts of British folk-rock. The title track manages simultaneously to convey party-hearty eagerness and world-weary exhaustion; “The Little Beggar Girl” uses music-hall tropes to create a snide commentary on the ruling class, and “The Great Valerio” is a metaphor for existential angst. If all of that sounds like a pretty heavy conceptual burden for a folk-rock album, well, it is — and the fact that the Thompsons carry it off so well is a tribute to Richard’s taste and skill as a songwriter and Linda’s as an interpreter.