Byrhtferth – Diagram of the physical and physiological fours that describes the interrelationship of the Elements of the Universe, “Ogham Enigma”, late 11th century.
Figure contains the twelve zodiac signs, two solstices, two equinoxes and the twice two seasons of the year; and in it are described the four names of the elements, names of the twelve winds and the four ages of man. At the same time are added the twice two letters of the name of the first man, Adam.
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