Comparing a new instrumental guitarist to John Fahey is a bit like relating a young pop-rock quartet to The Beatles or a new religious cult leader to Jesus of Nazareth: It's such an obvious and overused comparison that it's lost most of its currency. But Portland, Ore., player Marisa Anderson makes good on the reference not through her technique or wordless storytelling but instead through the gyre-sized range of influences she weaves into her impressionistic, moving fragments. There's the blues and bluegrass, old-time numbers and astral psychedelia, with melodic splinters of pop and country peppering the mix. Her second album, this year's wonderful Mercury, is appropriately named. Shifting between acoustic and electric guitars, it wends among syncopated slow gazes, quick jaunty gems and pensive six-string meditations with the restlessness of a traveler's diary.