Sally Archer was the wife of warp scientist Henry Archer, and the mother of Jonathan Archer.
When Jonathan had trouble sleeping as a child, Sally would often recite a poem for him. One poem she frequently recited was "The Song of the Wandering Aengus." (ENT: "Rogue Planet")
When Henry died of Clarke's Disease in 2124, she was forced to raise twelve-year-old Jonathan on her own. (ENT: "Cold Station 12", "In a Mirror, Darkly, Part II")
Mike Sussman, who wrote "In a Mirror, Darkly, Part II", revealed that Sally Archer was named for the mother of Scott Bakula, who played Jonathan Archer. 
External link Edit
Sally Archer at Memory Beta, the wiki for licensed Star Trek works