The Story of a Band on the Run,’ an oral history connected to Morgan Neville’s new documentary, we hear the rest of the stories.

This 12-mile walk is a choice for me, my sister and my niece; all of us have traveled many miles to be here today. But walking is also what people do when they have nothing left to lose.

Parsley, Sage, Rosemary and Thyme, and the duo’s final two albums—1968’s Bookends and 1970’s Bridge Over Troubled Water —included multiple tunes with inventive and unusual instrumentation, ...