(from the article `Mesopotamian religion`) ...as a whole, however, the forms of divination most frequently used seem to have been incubationsleeping in the temple in the hope that the god ... The will of the gods was discovered in various ways. Use of the Mesopotamian technique of liver divination (hepatoscopy) is evidenced by the... Found on http://www.britannica.com/eb/a-z/h/39
Hep`a·tos'co·py noun [ Greek ...; from 'h^par , 'h`patos , the liver + ... to view: confer French hépatoscopie .] Divination by inspecting the liver of animals. Found on http://www.encyclo.co.uk/webster/H/34