Agrippa's magical seal of Mercury comes from an eight-by-eight table, the largest after the Moon's in the series of the seven planets. The text clearly distinguishes the character of Mercury, that of his intelligence Tiriel, and that of his spirit Taphthartharath. This construction makes the Mercurial seal a sign of numerical magic rather than a variant of the astrological glyph ☿.
| Table | Why does Mercury have an 8 × 8 grid? |
|---|---|
| Seal | How can the planetary character be distinguished? |
| Astrology | What is its connection to ☿? |
| Functions | What does Agrippa associate with Mercury? |
| Legacy | Why is this seal suited to the language arts? |
Why does Mercury have an 8 × 8 grid?
The magic square of Mercury distributes sixty-four numbers across an 8 × 8 grid. Each row, column, and diagonal totals 260; the overall total is 2080.
This table provides the numerical basis for the seal and the other Mercurial characters reproduced by Agrippa.
How can the planetary character be distinguished?
The character of Mercury is printed separately from that of Tiriel and Taphthartharath. The book's caption makes it possible to identify each figure.
This separation avoids a frequent error in modern reproductions that present any Mercurial character as the "seal of Mercury."
What is its connection to ☿?
The glyph ☿ belongs to the common planetary language and is also used in alchemy for quicksilver.
Agrippa's magical seal belongs to a method based on the kamea and numerical correspondences.
What does Agrippa associate with Mercury?
The text attributes to a favorable Mercurial table functions related to gain, memory, understanding, divination, and reading hidden things through dreams.
Agrippa authorizes several materials: silver, tin, yellow brass, or parchment.
Why is this seal suited to the language arts?
In traditional astrology, Mercury governs speech, writing, calculation, study, and transmission.
The occult tradition surrounding the seal preserves this logic and employs it in operations related to intellect, communication, and knowledge.
Historical sources and context
Heinrich Cornelius Agrippa, De occulta philosophia, Book II, Chapter XXII, digital edition by Joseph H. Peterson.
