 In Agobard's defence, Florus wrote a short treatise on how bishops should be appointed; he also attacked Amalarius on theological grounds, accusing him of heretical interpretation of the liturgy.Florus also used his remarkable knowledge of Augustine to contribute to the Predestination debates of the mid ninth century, in which he defended Gottschalk of Orbais.In the course of these debates, Florus was able to show the inauthenticity of several Pseudo-Augustinian texts.