 Most of the artists in Paul’s group based fictional characters on each other and used each other in paintings.As opposed to his on and off relationship with Strindberg, Paul remained a lifelong friend of Sibelius and cooperated with him on several occasions.In 1898 Sibelius composed music to Paul’s play "Kung Kristian II" (King Kristian II) and in 1911 for the wedding march in "Die Sprache der Vögel".