- FondsSJCR - The Records of St John's College
- SubfondsSJGR - Governing records
- Series5 - Benefactors and Benefactions
- Subseries2 - Benefactions: scholarships / exhibitions / fellowships / lecturerships / studentships
- Sub-sub-series57 - Platt scholarships and fellowships
- 2 more...
- File5 - Copies of letters concerning Kentish Town copyholds 1653-70
- File6 - Platt and Tooker
- File7 - Platt: letters to estate tenants