For his ‘Ad librum’, physician, botanist and poet Euricius Cordus (Heinrich Ritze, 1486 Hessen-1535 Bremen) was inspired by Sidonius’ famous envoi ‘Propempticon ad libellum’ (Carm. 24), up to its Phalaecian hendecasyllables, providing it with overtones of Catullus and Martial: Ad…