The music of Will Oldham aka Bonnie ‘Prince’ Billie has always had a rusty quality to it, as if his songs were assembled with nuts and bolts that rattled as they moved, always slightly out of place yet somehow holding everything together. This has, by and large, lent to his previous releases having a consolatory quality, as if their rickety composition and his own quivering, fragile vocals provide some comforting projection of listeners’ most emotionally brittle, bare moments. That comforting aspect that has pervaded Oldham’s previous output has been given a far more meditative twist on his latest collaboration, one…