From left, Trevor Leonard, Brendon Thomas and James Downes of The End of America perform at Van Vleck House in Gardens in Montclair, on July 24. Photos by Michael Stahl; visit portraitsbymichaelstahl.com. “When you sing with two or three people and you get it right — when the whole becomes greater than the sum of its parts — everything kind of lifts a couple feet off the ground,” Graham Nash wrote in his 2014 memoir, “Wild Tales: A Rock & Roll Life.” That’s a pretty good description, as well, of the feeling you get when James Downes, Trevor Leonard and Brendon Thomas harmonize. Trevor Leonard …
