 "Isis", which had been revived on 14 December 1732, was particularly important for Pellegrin as it had a trio for the Fates.The dark colour of this act is enhanced by the use of solely male voices.There are lively and rhythmically inventive dances for the demons contrasted with Thésée's moving invocations to save the life of his friend Pirithous in music in which "the expression of the sentiment is cut down, as it were, to the bone".