- FondsSJCR - The Records of St John's College
- SubfondsSJCS - Clubs and Societies
- Series50 - The Purchas Society
- Subseries3 - Events: Purchas Society
- Sub-sub-series2 - Lectures: Purchas Society
- File1 - Lecture Programmes: Purchas Society
- File2 - Guest Speakers (1966-1979): Purchas Society
- File3 - Guest Speakers (1980-1989): Purchas Society
- File4 - Guest Speakers (1990-1999): Purchas Society
- File5 - Guest Speakers (2000-2009): Purchas Society