Hyginus Fabulae, 98. Iphigenia.

     Phaedra was the daughter of Minos and wife of Theseus. She fell in love with her stepson Hippolytus. When she was unable to bend him to her will, she wrote a letter to her husband alleging that Hippolytus had had sexual intercourse with her; she then hanged herself. When Theseus heard this, he banished his son and sought destruction for his own son from his father Neptune. Thus, when Hippolytus was driving his chariot team, a bull appeared suddenly from the sea. Terrified by the bull's lowing the horses dragged Hippolytus from his chariot and killed him.
     — translation RTMacfarlane


     47. hippolytvs.
Phaedra Minois filia Thesei uxor Hippolytum priuignum suum adamauit; quem cum non potuisset ad suam perducere uoluntatem, tabellas scriptas ad suum uirum misit, se ab Hippolyto compressam esse, seque ipsa suspendio necauit. et Theseus re audita filium suum moenibus excedere iussit et optauit a Neptuno patre filio suo exitium. itaque cum Hippolytus equis iunctis ueheretur, repente e mari taurus apparuit, cuius mugitu equi expauefacti Hippolytum distraxerunt uitaque priuarunt.