Dennis and Vinie Beth Jackson of Gainesville announce the engagement of their daughter Mary Lee Jackson to Robert Johnson Herron, son of Danny and Susan Herron of Brentwood, Tenn. The bride-elect is the granddaughter of Lunelle Jackson of Ellijay and the late Calvin Jackson, and the late Oscar Lee and Vinie Fay Smith. She is a 2007 graduate of North Hall High School in Gainesville.