OS 411879-1958Ordnance Survey: Boundaries Branch: Boundary Record Sheets: County Series (Full Sheets)
This series consists of printed Ordnance Survey maps used to record local authority, parliamentary and parish boundaries and boundary changes. The boundary record was added in colour coded lines and washes, which were updated with each boundary change. Obsolete boundaries were cancelled, their colours being washed down to a faint trace, but still clearly indicated on the maps.