- 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
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- Sub-sub-sub-series2 - Release of rent charges, Hornsey and St. Pancras, London
- Sub-sub-sub-series3 - Platt: legal papers and abstracts concerning estates
- Sub-sub-sub-series4 - St John's College vs Platt
- File5 - Copies of letters concerning Kentish Town copyholds 1653-70
- File6 - Platt and Tooker
- File7 - Platt: letters to estate tenants
- Sub-sub-sub-series8 - Platt bequest: receipts