Every now and again, a performer stops through Montreal bringing not just a prowess and artistry that impresses, but a living, embodied history. On Sunday, September 29th at the Rialto Theatre, POP Montreal offered one such show. Mavis Staples - a woman who worked closely with Dr. Martin Luther King alongside her father and sisters as part of The Staples Singers, sang in President Obama’s White House and has collaborated with everyone from Bob Dylan to Hozier - graced the Montreal audience with the divine power of gospel, soul, and blues.