Ori Apollinis Niliaci, De sacris notis et sculpturis libri duo. Quibus accessit versio, recèns per Jo. Mercerum, Uticensem concinnata et observationes non infrugiferae. - Horapollo, sec. IV-V
Text by Horapollo in ancient Greek (first part) and Latin translation followed by Jean Mercier's comments in Latin (second part)
The second part "Orus Apollo, De sacris apud aegyptios notis ac caelaturis, latinitate per Jo. Mercerum ..." has its own title page and pagination.
Dedicatory epistle in Latin by Jean Mercier addressed to Joannes at Sanctus Gelasius.
Chrétien Wechel's mark on the titles (Pegasus) and on the colophon of the first part and initials engraved on wood.