 Heytesbury’s extant writings, which are currently agreed to have originated in 1330s, typically develop a certain logical or physical theory through analysing sophisms. For most of these texts, there is a modern (in some cases critical) edition, some are available in incunabular editions and early prints, and several modern translations are available. There is a spectrum of works based on how certain their authenticity is in the present state of research. These break down to three categories, such that shifts between them in the future are possible (albeit unlikely in some cases):