Heracles Labors: The Cretan Bull.
     For his seventh labor, Heracles (Hercules) was ordered to capture the Cretan bull (probably the bull sent from the sea by Poseidon, which had fathered the Minotaur on Pasiphaë). The bull was now wandering through Crete, where Heracles subdued it and brought it back to Tiryns (some say riding across the sea on its back). He showed it to Eurystheus and then set it free. The bull roamed to Marathon, where it was eventually captured and sacrificed by Theseus.

Further Reference:
Galinsky, G. Karl. 1972. The Herakles Theme: The Adaptations of the Hero in Literature from Homer to the Twentieth Century. Totowa, N.J., Rowman & Littlefield.


Listings for Heracles' Labors are arranged under the following headings:
Heracles Labors, General List
The Nemean Lion
The Lernean Hydra
The Erymanthian Boar
The Ceryneian Hind
The Stymphalian Birds
The Stables of Augeas
Heracles and Antaeus
The Cretan Bull
The Mares of Diomedes
The Girdle of Hippolyta
The Cattle of Geryon
The Apples of the Hesperides
Cerberus

For Heracles entries generally:
Heracles