Geomancy

1660 Urquhart tr. Rabelais Gargantua & Pantagruel iii. xxv. Hard by here, in the Brown-wheat-Island, dwelleth Her Trippa; you know how by the Arts of Astrology, Geomancy, Chiromancy, Metopomancy, and others of a like stuff and nature, he foretelleth all things to come...

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The Arabian Geomancy, said to have been first practised by Almadul, was more recondite, being founded on the effects of motion under the crust of the earth, the chinks thus produced, and the noises or thunderings heard; its foundation was the dogma of Aristotle, that "the moving of the heaven is everlasting, and is the beginning and cause of all inferior movings."

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In geomancy, the enquirer himself was asked to stab the earth at random with a pointed stick. The soothsayer then read the dots.

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The fountain or the well represents a point where invisible energies flow into a society; in geomancy these would be known as "power points." Where these energies are, elementals or genii loci or nature spirits congregate.

Source: wiktionary