David,
I hope I haven't duplicated too much of what you have already.
The marriage at Caxton on 10th October 1820 of William BRIGHT and Elizabeth CORKETT (signed her name with a x), both of this parish, by Banns. Witnesses: Samuel Corkett and Geo Smith.
I'll give you listings of all the CORKET/CORKETT and BRIGHT marriages, baptisms and burials I found for Caxton in the transcripts in a book covering 1741-1851,
Marriage: on 29-04-1788 between John CORKET (x) of this parish; and Mary CHAPMAN (x) by Banns. Witnesses: Edward Bullen and Henry Anable.
Baptisms: 13-03-1796 Charlotte daughter of John and Mary CORKET
25-11-1798 Samuel son of John and Mary CORKET
03-01-1802 Elizabeth d. of John and Mary CORKET
22-09-1805 Robert s. of John and Mary CORKET
22-04-1810 Sarah d. of John and Mary CORKETT
I'm guessing that the Elizabeth CORKET, b. 1802, is the bride of William BRIGHT in 1820, and they appear to have the following children baptised:
12-08-1821 Charlotte daughter of William (shoemaker) and Elizabeth BRIGHT
11-01-1824 David son of William and Elizabeth BRIGHT
05-02-1826 Amelia d. of William and Elizabeth BRIGHT
25-05-1828 Mary Ann d. of William and Elizabeth BRIGHT
25-09-1835 John s. of William and Elizabeth BRIGHT.
(N.B. William's occupation throughout given as shoemaker)
Just to throw a few more pieces of your family jigsaw in, here are the burials:
09-03-1806: Robart CORKET, son of John and Mary, infant
03-08-1813: Charlotte CORKET aged 18
31-01-1832: Sara CORKET aged 22
30-07-1835: Mary CORKETT aged 66
and finally, burials for:
27-10-1835: Elijah BRIGHT aged 4
01-11-1837: Elizabeth BRIGHT aged 36
12-10-1851: Mary Anne BRIGHT aged 23
See how some of those burials tell of sad premature endings to some of those lives...
very best wishes,
Keith