Original sentence: O'Conor had a strong spiritual side which most eloquently found expression in a series of productions at religious-drama festivals and, unforgettably, as Christ in the York Mystery Plays (1951 and 1954)
Edited sentence: O'Conor had a strong spiritual side which most eloquently found expression in a series of productions at religious-drama festivals and, unforgettably, as Christ in the York Mystery Plays (1951 and 1954), to which his height, charismatic eyes and expressive voice brought an unforced, haunting sense of isolation