 His "Hieroglyphica sive de sacris Aegyptiorum litteris commentarii" seems to have been composed earlier than that, although it was published much later.The work covered the whole field of the meaning of hieroglyphics, but lacked the scholarly rigour of the antiquarian Laurentius Pignorius (1571–1631), whose "Characteres Aegyptii, hoc est Sacrorum, quibus Aegyptii utuntur, simulachrorum accurata delineatio et explicatio" of 1608 investigates the origin of the tablet as an archaeological object.Avoiding interpretation of the meaning, the author expressed doubt as to whether the images were at all meaningful, in which he was subsequently proven right.