 In first instance, the Greek logical heritage was almost single-handedly (though selectively) passed on to the Latin tradition by one man, the neo-platonic philosopher Boethius. Prior to the late 12th century (Aristotle’s and other ancient texts became widely read again in the Christian parts of Europe only in the 12th century — see (Dod 1982)), what the medieval authors had inherited from Greek logic had been almost exclusively transmitted by Boethius, who had also established the logical terminology in Latin. His translations of Aristotle’s Categories and De Interpretatione were widely read, as well as his textbooks on syllogistic and his two texts De hypotheticis syllogismis (On Hypothetical Syllogisms – HS) (dating 516–522) and De topicis differentiis (On Topical differentiae — TD) (dating 522–523).