History of Animals, Book I: On Viviparous Quadrupeds

A woodcut portrait of Conrad Gessner set within an oval frame, which is itself contained within an ornate rectangular cartouche featuring scrolls and floral motifs. The subject is a bearded man with short hair, wearing a fur-collared garment, facing slightly to the right. The oval border contains the Latin inscription: "CONRAD GESSNER OF HIS AGE 39 IN THE YEAR OF THE LORD 1555."