| Date Note | Base map is likely to be earlier than the colouring. |
| Description | Maps of Suffolk, annotated with geological lines, notes and colouring by Frederick William HARMER, used as field maps during research into glacial deposits in the south-east of England, [1862-1872]. Base maps are Ordnance Survey, one inch (Old Series) quarter sheets no.50 (NE Halesworth; NW Diss). Dissected and mounted on linen. |