Thanks M for spotting & correcting my foolish mistake wrt Charlotte's maiden name.
Don't know what I was thinking there.
Apologies to all, have now amended my earlier post.

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I see from 1881 Census Charlotte was aged 28, so born Saul abt 1853.

I think this is her Baptism, from GlosBMD;

Birth Details
Child Surname Child Forename Father Surname Mother Surname Mother's Former Name Year District Office Register Entry
GRIFFIN Charlotte GRIFFIN GRIFFIN JACKSON 1851 Gloucester Gloucester, Frampton 5 170

(Looks like her 1881 Census entry was another example of not wanting to be over 30yrs, and why not)

FreeBMD adds the June qtr;

Births Jun 1851 (>99%)
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Griffin Charlotte Wheatenhurst 11 522

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I think this may possibly be her parent's marriage, but more proof needed, from FreeBMD;

Surname First name(s) District Vol Page
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Marriages Dec 1851 (>99%)
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Andrews William Cirencester 11 401
Butt Elizabeth Cirencester 11 401
Gibbons Alfred Cirencester 11 401
Griffin Luke Cirencester 11 401
HYATT Ellen Cirencester 11 401
Jackson Sarah Cirencester 11 401

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Hoping this helps, rather than hinders ! ;-)