Most of his remaining librettos were written with Caillavet , often for Terrasse who was their most frequent musical collaborator .
His third opera libretto , Les travaux d'Hercule ( 1901 ) , marked his first collaboration with fellow playwright Gaston Arman de Caillavet and composer Claude Terrasse .
Most of his remaining librettos were written with playwright , often for composer who was their most frequent musical composer .
His third opera libretto , Les travaux d'Hercule ( 1901 ) , marked his first collaboration with fellow playwright Gaston Arman de Caillavet and composer Claude Terrasse .