snipped from
http://machaut.uchicago.edu/cgi-bin/WEBSTER.page.sh?PAGE=101...
Augurial
Au*gu"ri*al (?), a. [L. augurialis.] Relating to augurs or to augury.
Augur
Au"gur (?), n. [L. Of uncertain origin: the first part of the word is perh. fr. L. avis bird, and the last syllable, gur, equiv. to the Skr. gar to call, akin to L. garrulus garrulous.]
1. (Rom. Antiq.) An official diviner who foretold events by the singing, chattering, flight, and feeding of birds, or by signs or omens derived from celestial phenomena, certain appearances of quadrupeds, or unusual occurrences.
2. One who foretells events by omens; a soothsayer; a diviner; a prophet.
Augury
Au"gu*ry (?), n.; pl. Auguries (). [L. aucurium.]
1. The art or practice of foretelling events by observing the actions of birds, etc.; divination.
2. An omen; prediction; prognostication; indication of the future; presage.
3. A rite, ceremony, or observation of an augur.
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so, perhaps it was a place for shamanic meditation and divination?