- FondsSJCR - The Records of St John's College
- SubfondsSJAR - Administrative records
- Series1 - Master
- Set2 - 18th Century Masters
- SubseriesPowell - William Samuel Powell (1765)
- Sub-sub-series1 - Notes on the College Accounts: William Samuel Powell
- Sub-sub-series2 - Shrewsbury Letters: William Samuel Powell