Gillian Welch and David Rawlings released their latest Gillian album back in June and at long last they’re returning to town to play a stage that’s been very welcoming to their music over the years — The Ryman’s. The Harrow & The Harvest picks up where their 2001 classic Time (The Revelator) left off — postmodern rustic vignettes, haunting melodicism and the tiny, knitted intricacies of their voices and picking. At every tour stop they’ve no doubt been asked why it took them eight years to release the follow-up to their last album, 2003's Soul Journey. But here’s a number Welch and Rawlings are probably more fond of: 20 years. Welch said that next year will mark “20 years Dave and I have been working together, playing together as a duet; 20 years since we’ve been in Nashville.” Lord knows new generations of Americana acts have tried to write like them, sound like them, but it just can’t be done. Together, they’re one of a kind.