1855-1896 
      County Series 
      1:2,500 | 
            1880-1910  
      County Series 
      1:10,000 | 
            1805-1874  
      Old Series  
      1:30,000 - 1:50,000  | 
            1871  
      Registration  
      District 
      1:30,000 - 1:50,000 | 
            1896-1904 
      Revised New  
      1:30,000 - 1:50,000 | 
            1919-1926  
      Popular Edition  
      1:30,000 - 1:50,000 | 
            1945-1948  
      New Popular 
      1:30,000 - 1:50,000 | 
            Present Day  
      Ordnance Survey 
      1:30,000 - 1:50,000 |