Hi Kieth,
1861 Marsh Chaple (spelling as per census sheet:RG9/2386/75 pg 13)
Edward Ling, Head, mar, 26, ag lab, b Ludborough
Louisa ,wife,mar,25,b (can't recognise place..but guess Kirmond)
Fred ,son,4, b Utterby
William, son,2,b Northcoates
George,son, 11 months, b Northcoates
William and George may be in Free BMD (Louth)- can't see Fred
Louisa would probably be Louisa Wilkinson bap 14 Dec 1835, Kirmond le Mire, dau of William and Eliza (Edward and Louisa's later children - ref 1871 census, use Wilkinson as a middle name) William Wilkinson mar Eliza Andrew 27 Aug 1832, Kirmond le Mire (Westwold deanery marriages).
Looks promising, I think, as your Fred Leng in Sculcoates in 1901, uses the Ling spelling in 1891.
John