represents a substantive advance in discourse analysis methodology. An intertextual approach to register emphasises that discourses reuse texts from the past (thus their conventional nature) but also respond to, reaccentuate and rework past discourses.53 In other words, any given discourse, as part of a specific register, both obeys and disobeys convention. Discourses are related to past texts, both horizontally—as part of a chain of successive communications (e.g. Paul’s letter as part of a series