BISHOPVILLE, S.C. — Lee Correctional Institution, South Carolina’s largest maximum-security prison, gets plenty of bad press — from a riot and a lockdown in February to drone-delivered contraband a few days ago. But within the walls of this all-male complex, something rare and beautiful is also happening. On a recent serendipitous visit to the prison with a friend, renowned cellist Claire Bryant, and a group of her fellow New York musicians, I was privileged to witness the transformative power of music scored with human kindness.