Could this be Charlotte's marriage -
Oxford Journal 6 Sept 1823.
At Clapham, Richard Bevan Esq. youngest son of S. Bevan Esq. of Fosbury, Wilts to Charlotte, daughter of the late Lieut.Col Hunter of the 19th Reg.
If so, then there is this tree on Ancestry, that seems to be for her:
https://www.ancestry.co.uk/family-tr...53610813/facts
She died in Brighton in 1835 at age 34.