Io. Fernelii Ambiani de abditis rerum causis libri duo
Jean Fernel's 1560 Latin treatise on the hidden causes of things, printed in Paris by Andreas Wechelus under the sign of Pegasus, a learned medical text for scholars and physicians. Its pictures are small woodcut ornaments: a large decorated initial O, a winged horse above entwined serpents and caduceus-like staves, a scrolled cartouche with a central mask, and a historiated initial S, all in dense black line with a Renaissance strapwork vocabulary a designer could borrow for borders, capitals and emblem-style marks.
