You can obtain parish record information for a number of Lancashire Parishes at:
http://www.lan-opc.org.uk/. The record for Nathan is:Baptism: 9 May 1795 All Saints, Wigan, Lancashire, England
Nathan Needham - first Son of James Needham & Betty (formerly Farnworth)
Born: 18 Apr
Abode: Hindley
Occupation: Weaver
Mother's Parents: Nathan & Martha Farnworth
Register: Baptisms 1779 - 1799, Page 379
Source: Original register at Wigan Archives
I can find a marriage for a Nathan:
Marriage: 1 Jan 1819 All Saints, Wigan, Lancashire, England
Nathan Needham - (X), Parish of Wigan
Nancy Boardman - (X), Parish of Wigan
Witness: John Gerran; Saml. Vizard
Married by Banns by: Edwd. Hill Curate
Register: Marriages 1816 - 1819, Page 201, Entry 601
Source: LDS Film 1885691
Hope this helps