possibility ?
Baptism: 7 May 1809 St Laurence, Chorley, Lancashire, England
Elisabeth Boulton - Daughter of William Boulton & Ann
Born: 4 Mar 1809
Abode: Duxbury
Register: Baptisms 1798 - 1812, Page 57, Entry 37
Source: LDS Film 93703
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if it is the right couple
Baptism: 3 May 1807 St Laurence, Chorley, Lancashire, England
James Bolton - Son of William Bolton & Ann
Born: 12 Apr 1807
Abode: Duxbury
Register: Baptisms 1798 - 1812, Page 47, Entry 20
Source: LDS Film 93703
Baptism: 23 Dec 1810 St Laurence, Chorley, Lancashire, England
Thomas Boulton - Son of William Boulton & Ann
Born: 4 Dec 1810
Abode: Coppul
Register: Baptisms 1798 - 1812, Page 64, Entry 47
Source: LDS Film 93703
Baptism: 17 Jan 1813 St Laurence, Chorley, Lancashire, England
Mary Boulton - Daughter of William Boulton & Ann
Abode: Coppul
Occupation: Collier
Baptised by: O. Cooper
Register: Baptisms 1813 - 1821, Page 2, Entry 16
Source: LDS Film 93703
Baptism: 5 Feb 1815 St Laurence, Chorley, Lancashire, England
Ann Bolton - Daughter of William Bolton & Ann
Abode: Coppul
Occupation: Collier
Baptised by: O. Cooper
Register: Baptisms 1813 - 1821, Page 10, Entry 555
Source: LDS Film 93703
Baptism: 6 Oct 1816 St Laurence, Chorley, Lancashire, England
William Bolton - Son of William Bolton & Ann
Abode: Coppul
Occupation: Collier
Baptised by: Richard Hodgson
Register: Baptisms 1813 - 1821, Page 10, Entry 1059
Source: LDS Film 93703
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abode Duxbury then Coppul ? looks probable - if it is them they had moved from Duxbury to Coppul by 1810
on the other hand - William a Collier - Coal Miner - doesn't tie in with living at Duxbury Hall ?? - then again - we don't see William as a Collier until 1813 - a year after you say the Hall changed hands - so - was William in service at Duxbury Hall until 1812 ...sorry if it makes it MORE confusing
ADDED - 5 miles from Duxbury Hall
Marriage: 15 Dec 1806 St Wilfrid, Standish, Lancashire, England
William Bolton - (X), This Parish
Ann Halton - (X), The said Parish
Witness: John Smith; Peter Turner
Married by Banns by: John Price, Curate
Register: Marriages 1792 - 1812, Page 165, Entry 493
Source: LDS Film 1526141