The Byrds were still a year and change from their messy end when they played the newly unearthed London show on Live at Royal Albert Hall 1971 (Sundazed). This is the (Untitled)-era Byrds — singer-guitarist Roger McGuinn, drummer Gene Parsons, bassist Skip Battin and lead guitarist Clarence White — in sparkling last-hurrah mettle, mixing space flight and prairie dust in jangle and repertoire, and singing, at the very end, a short, wonderful “Amazing Grace” in backwoods-chapel a cappella harmonies.