What does the word Herself mean?

Usage examples for Herself

  1. She, herself, could not go, could not, could not! – The Saint by Antonio Fogazzaro Commentator: William Roscoe Thayer
  2. But why didn't mamma come herself? – Mildred's New Daughter by Martha Finley
  3. Why, man, she has convinced herself that she's going to die in a week! – The Best Policy by Elliott Flower