No separate population statistic is available for Twenty. The best available report lumps together Dyke, Twenty, South Fen and Spalding Road outside Bourne, with a total of 495,[1] with Dyke being the largest.
Modern drainage
The area falls within the drainage area of the Black Sluice Internal Drainage Board.[2] They maintain a small electric pumping station to the west of the crossroads, called Twenty Pumping Station
Wheeler, W. H. A History of the Fens of South Lincolnshire, 2nd edn. Boston & London. 1896. Facsimile edn Paul Watkins. Stamford. 1990. ISBN1-871615-19-4 .
Ordnance Survey. 1:25 000 First Series. Sheet TF12 (Dowsby). 1955.
Croft, E. Lincolnshire Railway Stations. Reflections of a Bygone Age. Nottingham. 1993. ISBN0-946245-77-0 . (a photo of Twenty Station).
Dugdale, W.Imbanking and Draining. 1662. (Map of the Lindsey Level.)
Bevis, T. Hereward and De Gestis Herwardi Saxonis Westrydale Press. March. 1981. (direct translation of the Peterborough monk's work).