On 23 Mar 1643 Charles Cavendish (age 22) was captured at Grantham [Map].

Evelyn's Diary. 20 Aug 1654. From hence we had a most pleasant ride over a large heath open like Salisbury Plain, to Grantham [Map], a pretty town, so well situated on the side of a bottom which is large and at a distance environed with ascending grounds, that for pleasure I consider it comparable to most inland places of England; famous is the steeple for the exceeding height of the shaft, which is of stone.

The River Witham rises near South Witham, South Kesteven [Map] from where it flows past North Witham, South Kesteven [Map], Colsterworth, South Kesteven [Map], Easton, South Kesteven [Map] to Great Ponton, South Kesteven [Map] where it is joined by the Cringle Brook.

From Great Ponton, South Kesteven [Map] the River Witham flows through Grantham [Map], Belton, Grantham [Map], past Barkston, South Kesteven [Map], Marston, South Kesteven [Map] and Hougham, South Kesteven [Map], Westborough, South Kesteven [Map], Long Benington, South Kesteven [Map], Claypole, South Kesteven [Map], Beckingham, North Kesteven [Map], Norton Disney, North Kesteven [Map], Bassingham, North Kesteven [Map], Haddington, North Kesteven [Map], Aubourn, North Kesteven [Map] through the centre of Lincoln, Lincolnshire [Map] where it joined by the River Till.

From Lincoln, Lincolnshire [Map] it flows under Five Mile Bridge [Map], past Bardney Abbey [Map], Kirkstead [Map], under Tattershall Bridge [Map] after which it is joined by the River Bain

After Tattershall the River Witham flows through canalised sections under Lanrick Bridge [Map], past Anton's Gowt [Map] to Boston [Map] where it is joined by the South Forty Foot Drain. After Boston [Map] the River Witham flows into the The Wash around eight kilometres away.