The first topic of the Introduction is Hermes Trismegistus, with an image of The Emerald Tablet from Khunrath's Amphitheatrum sapientiae aeternae, 1606. Roos includes this famous quote from a Hermetic text: "The below is as the above, and the above as the below, to perfect the wonders of the One."
There is a pair of lovely images from M. Maier, Atalanta fugiens, 1618: "The wind bears it in its belly," and "Its nurse is the Earth."
He emphasizes the pictures as code with a quote from the Rosarium philosophorum: "But where we have written something in code and in picture we have concealed the truth."
Hermaphrodite: supposed to be read as blend of sensual stimulus (Aphrodite) and intellectual appeal (Hermes).
Roos mentions the interpretation of the Egyptian hieroglyphs (prior to their decipherment by Champollion) as a "symbolic, rebus-like, esoteric script." I did some work on Horapollo back in graduate school; this sounds like a good excuse to drag those notes out again! Roos includes some of Durer's illustrations for Horapollo.
There is a wonderful emblem of Hermes from Achilles Baccius, Symbolicarum quaestionum (1555), with a Greek saying attributed to Simonides: After having spoken, I have often repented, but never after having kept silent.
ΛΑΛΗΣΑΣ ΜΕΝ ΠΟΛΛΑΚΙΣ ΜΕΤΑΝΟΗΣΕ, ΣΙΩΠΗΣΑΣ ΔΕ ΟΥΔΕΠΟΤΕ
Okay, I'll stop there and see what I can find online for these books!
Amphitheatrvm sapientiae aeternae : solius verae, christiano-kabalisticvm, divino-magicvm, nec non physico-chymicvm, tertrivnvm, catholicon / instructore Henrico Khvnrath. Hathi Trust.
He has his dog with him on the title page! :-)
And there are LOTS of copies of Atalanta fugiens : hoc est, Emblemata nova de secretis naturae chymica / athore Michaele Majero. Hathi Trust.
Here are the images Roos included:
Hathi Trust. This one is my favorite so far; I will definitely be coming back to this one! Here is the Hermes that Roos included with the Simonides quote below the figure of Hermes. There is also a Latin superscription: MONAS MANET IN SE, "the one abides in itself."
And it took some sleuthing, but it's possible to learn about Durer's illustrations for Horapollo here: Die Hieroglyphenkunde des Humanismus in der Allegorie der Renaissance by Karl Giehlow (1915). Hathi Trust. See especially the illustrations at p. 173 and following.