The Ninth Engraving

For the fictional Harvard symbologist Robert Langdon,
a commentary on the favicon in today's noon post—

This is from a novel that was filmed as "The Ninth Gate."

The book and film concern a series of nine engravings.
For all nine, see an excellent analysis by Michael S. Howard in
his journal "Gnostic Essays" on November 20, 2006.

A summary of the engravings—

Click to enlarge.

See also this  journal on that date.