Rāmānujācārya’s Tantrarahasya, a philosophical treatise mainly dedicated to the hermeneutics and epistemology of the Pūrva Mīmāṃsā School, might be considered hardly more than a jigsaw of reused passages, since one third of it has a direct source, and a further third has its roots in interlanguage usage. It is thus a perfect case study for investigating the compositional habits of philosophical authors in pre-modern śāstra literature. The article analyses the formal aspects of textual reuse by Rāmānujācārya and draws some general (...) conclusions regarding the author’s intellectual affiliation to Prābhākara Mīmāṃsā on the basis of the way he reuses his school’s texts as compared to the reuse of other schools’ texts. A final section discusses the possibility of generalising these results to the approach to textual reuse of the whole Pūrva Mīmāṃsā. (shrink)