While walking through the wilderness, Hercules was set upon by the Dryopes. Hercules had mercilessly slain their king, Theiodamas, over one of the latter's bulls, and made war upon the Dryopes. After the death of their king, the Dryopes gave in and offered him Prince Hylas. Years later, Hercules and Hylas joined the crew of the Argo. As Argonauts, they only participated in part of the journey. In Mysia, Hylas was kidnapped by the nymphs of a local spring. Hercules, heartbroken, searched for a long time but Hylas had fallen in love with the nymphs and never showed up again. Either way, the Argo set sail without them.
