THESE Boots are made for walking, as Manhattan singer-songwriter Gillian Welch gives air to the alternate versions, outtakes, demos and live radio offshoots from her debut roots music album Revival in her answer to Bob Dylan's Basement Tapes.

To mark Revival's 20th anniversary, Welch and guitar-playing partner David Rawlings have curated and produced this 21-track companion piece, working in tandem with archivist Glen Chausse to select unpolished pearls from Welch's library of analogue tape recordings.

"I'm happy that the songs hold up," she says, but then again her songs have always had a timeless quality. More significantly, she notes how "any writer's first batch of songs seems to have something that is different from what comes after", settling on "purity" being that difference from a time when "there really was no me" and "the artist Gillian Welch didn't really exist".

You wouldn't call it innocence, because Welch's songwriting arrived fully formed and piercingly perceptive. Treasure hearing the rarity Georgia Road, the earliest demo of Orphan Boy and a host of unreleased songs set free.