Sorry I cant find a Marriage.
WILLIAM Parker may have been Bapt 29 Apr 1770 St Peter, Roydon to JOHN/RHODE
Siblings;
JOHN 17 Apr 1768, buried 19 Oct 1770 age 2 and a half
JOHN 26 Feb 1775
ANNE 11 May 1777
BENJAMIN 18 Jul 1779 (mother as Rhodey)
John PARKER married Rhoda SHADBOLT 12 Oct 1767 same Church
RHODA was buried 03 Jan 1819 age 72
JOHN buried 01 Apr 1829 age 86, abode Poor house
All on FreeREG