Alice Childress wrote plays, books and newspaper columns for more than 40 years and is considered one of the premier chroniclers on African American backstories, tales buried by time but tales priceless and emotion wrenching still. Bonnie Monte, executive director of the Shakespeare Theatre of New Jersey, is always looking for unapplauded work and found two of Childress plays, Florence and Mojo, and combined them for a duo of plays. They opened last weekend at the theater, housed at Drew University, in Madison.