Season 2, Episode 17.
The victory surely alludes to Amanda finally exonerated of a fire at her foster home. Unfortunately it was Eli who did it a fact that was revealed by Meredith when he humiliated Meredith on television.
The letters from Amanda's father to Amanda was thought to have been destroyed by the fire at the foster home that was wrongly blamed on Amanda. The letters were instead sold to Mason Treadwell and they were destroyed in the fire at Mason's place that was ironically caused by Amanda herself.
Meanwhile Revenge has been renewed for a third season.