Due east of the Blue Mountains of Broad Street, Alison Krauss and Union Station proved why they are rightly hailed as the masters of contemporary bluegrass.
It may not be a mass market genre in the UK, but it cannot be long before the joy of bluegrass achieves cross-over success if Krauss and her hugely gifted band continue to perform like they did at Symphony Hall.
Band member Dan Tyminski's voice, if not his face, is already known to millions after George Clooney lip-synched to his vocals on the film Oh Brother, Where Art Thou? But on the basis of this spiritually invigorating two-hour show, Krauss and Union Station richly deserve their own share of stardom.
Krauss, a superbly talented fiddle player, set the stage alight with her infectious charm and heartbreaking vocals. The evening showcased the group's latest album, Lonely Runs Both Ways, and the songs provide marvellous expression for Krauss's range, from the tender, wandering lament of Gravity to the building glory of A Living Prayer (written by band member and banjo/guitar player Ron Block), which closed the evening to a standing ovation.
It's not difficult to see why 33-year-old Krauss has already picked up 17 Grammys but what takes her performance to another level is the all-round brilliance of Union Station.
Jerry Douglas is one of the world's best dobro players and treated the audience to a hypnotic four-tune medley that veered from country/bluegrass to blues. This wonderful acoustic-type guitar contains steel resonating discs inside the body and seems to create the sound of about three different instruments. Magical.
A touch perfect acoustic guitar and mandolin player, Tyminski also takes lead vocals for several songs, including the Woody Guthrie classic Pastures Of Plenty, where the holler of the migrant worker was underpined by Block's mesmerising banjo riff.
Other unexpected treats included Krauss's rendition of the Foundations's 1967 No 1 hit Baby, Now That I've Found You.
And having found Krauss and Union Station, new fans won't want to let them go.