Hylas
The young companion lost at a spring while fetching water, causing Heracles to leave the expedition.

Overview
Hylas’ disappearance shows that a rostered hero can be lost during ordinary labour. He leaves the ship with a water jar, not for battle; a spring nymph pulls him away in desire, and the source gives him no statement of consent.
Relationships
- Heraclestravels as companion
Hylas is raised by Heracles and travels with him on the outward voyage.
- Argonaut Expeditiondisappears while fetching water
Hylas leaves to fetch water, is taken by a spring nymph and does not return.
- Heraclesremains to search
After hearing Hylas may be in danger, Heracles leaves the shore camp to search.
Story appearances
- The ArgonautsHylas in the Argonaut expedition
Hylas enters this story through the Argonaut expedition; other versions are handled where their own episodes call for them.
Ancient sources
MythWeave distinguishes ancient-source evidence from later adaptations and modern interpretation.