There is no interaction between Duke Senior and Duke Frederick either at the beginning or at the end of the play. Duke Frederick has managed to usurp his older brother's dukedom and has banished him. No doubt they dislike each other, but Duke Senior takes the turn of events philosophically and does not express much feeling of any sort towards his brother. At the conclusion of the play we learn from a minor character, Jacques Du Boys, who is the second son on Sir Rowland and brother of Oliver and Orlando, that Duke Frederick became alarmed by the fact that "Men of great worth" were coming to join Duke Senior in the Forest of Arden. Fearing an overthrow, Duke Senior raised an army and came to the forest to kill his brother. But Duke Frederick, according to Jacques Du Boys, met "an old religious man" and most miraculously "was converted / Both from his enterprise and from the world." He has decided to lead a religious life and has restored the dukedom to Duke Senior.