- FondsSJCR - The Records of St John's College
- SubfondsSJES - Estates
- Series2 - Estates and manors
- Subseries10/BRK - Birchington, Kent
- Sub-sub-series1 - Maps: Birchington
- File5 - Tithe maps: Birchington
- Item1 - Crop rotation: Birchington
- Item2 - Altered 1866 tithe map: Birchington
- Item3 - Thomas Ashenden map: Birchington
- Item4 - Copy T. Ashendon's Map: Birchington
- Item5 - Altered 1887 tithe map: Birchington