Using the Lancashire On-Line Parish Clerk site (
http://www.lan-opc.org.uk/Search/indexp.html ) and looking for Richard Rigby buried 1787+/-20 years showed -
Burial: 24 Apr 1803 St John the Baptist, Broughton, Lancashire, England
Richd. Rigby -
Age: 83
Abode: Haighton
Register: Burials 1759 - 1803, Page 60, Entry 7
Source: LDS Film 1470861
This suggests that he was born ca 1820. This site also has the following that MIGHT be this family -
Burial: 9 Apr 1780 St John the Baptist, Broughton, Lancashire, England
Ellen Rigby - Wife of Richd. Rigby
Abode: Haighton
Register: Burials 1759 - 1803, Page 25, Entry 26
Source: LDS Film 1470861
Marriage: 7 Nov 1774 St John the Baptist, Broughton, Lancashire, England
Nicholas Rigby - Husbandman, Haighton in this Chapelry within the Parish of Preston
Jennet Carter - (X), Spinster, Broughton in this Chapelry within the Parish of Preston
Witness: Wm. Blacow; John Arkwright
Banns Read: 23 Oct 1774, 2nd: 30 Oct 1774, 3rd: 6 Nov 1774
Married by Banns by: Ran: Andrews, Vicar
Register: Marriages 1754 - 1805, Page 27, Entry 109
Source: LDS Film 1470861
Marriage: 23 Sep 1783 St John the Baptist, Broughton, Lancashire, England
Richard Rigby - Husbandman, Haighton in the Parish of Preston
Mary Forrest - (X), Broughton in the Parish of Preston
Witness: Mary Dunderdale, (X); John Arkwright
Banns Read: 7 Sep 1783, 2nd: 14 Sep 1783, 3rd: 21 Sep 1783
Married by Banns by: George Charnley, Curate
Register: Marriages 1754 - 1805, Page 43, Entry 171
Source: LDS Film 1470861
Marriage: 1 May 1775 St John, Preston, Lancashire, England
William Rigby - (X), Husbandman, Haighton of this Parish
Anne Gornall - Spinster, Fulwood in the Parish of Lancaster
Witness: Henry Barns; Nicholas Rigby
Married by Licence by: R. Andrews Curate of Broughton
Notes: [Bride signed] Ann Rigby late Gornall
Register: Marriages 1754 - 1778, Page 42, Entry 1075
Source: LDS Film 1278740
Marriage: 28 Jul 1782 St John, Preston, Lancashire, England
James Rigby - Husbandsman, Haighton in the Chapelry of Broughton in the parish of Preston
Elizabeth Ward - Spinster, Haighton in the Chapelry of Broughton in the parish of Preston
Witness: Robert Townley; Henry Simpson
Married by Licence by: Josh. Southward Curate
Register: Marriages 1778 - 1785, Page 82, Entry 240
Source: LDS Film 94013
Marriage: 26 Jul 1785 St Anne, Woodplumpton, Lancashire, England
Richard Rawsthorne - (X), Haighton in the Parish of Broughton
Elizabeth Rigby - Haighton in the Parish of Broughton
Witness: John Crook; Thos. Cookson
Married by: Matthew Worthington Curate
Notes: [Neither Banns nor Licence specified]
Register: Marriages 1784 - 1803, Page 4, Entry 10
Source: LDS Film 1470949
Marriage: 15 May 1784 St John the Baptist, Broughton, Lancashire, England
Richard Mayor - Haighton in the Parish of Preston
Alice Rigby - (X), Haighton in the Parish of Preston
Witness: Betty Rigby; John Arkwright
Banns Read: 18 Apr 1784, 2nd: 25 Apr 1784, 3rd: 2 May 1784
Married by Banns by: Geo: Charnley, Curate
Notes: [Groom signed] Richd. Mayor
Register: Marriages 1754 - 1805, Page 44, Entry 177
Source: LDS Film 1470861
There is also this one from a nearby place -
Marriage: 10 Apr 1804 St Mary the Virgin, Goosnargh, Lancashire, England
George Rigby - (X), Goosnargh
Ellen Miller - (X), Goosnargh
Witness: Richard Rigby, (X); Henry Grimbalston
Married by Banns by: Joshua Southward Minister
Notes: Banns published; dates not given; Brides status not given
Register: Marriages 1784 - 1812, Entry 641
Source: LDS Film 1470930
Hope these help.