This article identifies as the work of Richard Baxter a set of ecclesiastical directions and reading recommendations contained in fos 180–208 of St John's College, Cambridge, MS K.38, once tentatively ascribed to Thomas Barlow, but demonstrably a close analogue of British Library, MS Harleian 6009, which is a copy of a lost Baxter original. Internal evidence of MS K.38 and comparison with MS 6009 and Baxter's Christian directory imply both an earlier date and a wider circulation of Baxter's archetype than hitherto suspected, suggesting a new direction of inquiry into Baxter's scholarly and ecclesiastical associations.