Anthropology of Magic,

The 19th call lifts the magician's mind to the æthyrs and can be used to summon any one of the Aires. Actually there are 49 Calls (Zero being the first), but only the latter 30 are the æthyrs themselves. There are also 92 Governors, whose names can be found in the Watchtowers. At least 3 Governors are assigned to each aethyr. ................
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