Hi
So Ann's maiden name is White.
The couple married 18.4.1824 at Ashover Derbyshire.both of this parish and both signed.
Witnesses William Mycroft and Mary White.
Tombstone here
https://www.findagrave.com/memorial/176257032/george-mycroftThe 1851 census gives George 's birth as 1788 Blackwell.
Bapt 23.3.1788 Blackwell George s of Mathew and Mary Mycroft.
Siblings Jane 14.3.1790,Mathew 27.1.1792 ,Joseph 25.2.1795,Mary 19.8.1798,William 6.3.1801,Francis 16.10.1803 ,Margaret 25.10.1804 ,Ann 16.2.1807 and Francis 2.10.1808.
Mathew Mycroft bapt 7.7.1765 Blackwell s of Mathew and Jane.He was buried there 21.2.1827
He married Mary Nighton 18.3.1788 .So a bit of a shot gun wedding.
Mary 1767-25.9.1838.
The Mycroft family seem to go back quite away at Blackwell.
Hope that helps
Ciderdrinker