Dante:

see Chapter 1 Introduction, page 20

 

Wolfram:

(1160-1220) German knight & poet, one of the great epic poets of medieval literature. As a Minnesinger, he also wrote lyric poetry; best known for his Parzival, regarded as the greatest of all epics of Medieval Germany and the first known work in German about the Holy Grail.

 

alluvial period:

Spengler refers to a geologic age known as the Quaternary Period,  Periods are  a subdivision of geologic time which allow geologists to cross-reference rocks & geologic events from place to place.  The Earth's history is split into a hierarchy of such divisions.  The Quaternary is the current & most recent period of the Cenozoic Era & is dated from 2.5 million years ago to the present.  Most alluviial deposits (deposits of sand &  mud formed by flowing water) are from  the Quaternary Period; they are referred to as "cover" because their sediments obscure the underlying bedrock; they include sedimentary matter deposited within recent times, especially in the valleys of large rivers. 

 

Divine Commedia:

see Chapter 2 Numbers, page 85

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cachet:

an official seal, as on a letter or document, a distinguishing mark, feature; stamp; a sign or expression of approval from a person who has a great deal of prestige; superior status; prestige.

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data:

individual facts, statistics, or items

 

symbols:

some representation of the Prime Phenomenon; of becoming as BECOME, and as such reflecting Destiny and not random or accidental Incident