Hercules contracted a disease and asked for a truce, but the twins knew it was too good an opportunity to miss.
Madness: Euripides' tragedy Hercules Furens is one of the sources for the madness of Hercules.
The story, like most of those involving Hercules, has confusing and contradictory details, but in essence, Hercules, returning from the Underworld in some confusion, mistook his own sons, ones he had with Creon's daughter Megara, for those of Eurystheus.
Hercules may have married Megara to his nephew Iolaus before leaving Thebes forever.
Hercules' Fight With Apollo: Iphitus was the son of Apollo's grandson Eurytus, who was the father of the beautiful Iole.
This was another dishonorable murder for which Hercules needed to atone.
The provocation may have been that Eurytus denied him the prize of his daughter, Iole, that Hercules had won in a bow-shooting contest.[Apollodorus.]Cadmus is usually attributed with introducing letters into Greece, but Linus taught Hercules, and the not very academically inclined Hercules broke a chair over Linus' head and killed him.Elsewhere, Cadmus is credited with killing Linus for the honor of introducing writing to Greece.Apollo came after him and was joined by his sister, Artemis. It took Zeus and his thunderbolts to put an end to the fighting, but Hercules still hadn't made atonement for his act of murder.On a related note, Apollo and Hercules both confronted Laomedon, an early king of Troy who refused to pay either Apollo or Hercules.In Book 21 of the Odyssey, Odysseus obtains the bow of Apollo when he helps in the hunt for Eurytus' mares.