Henbury Parish Records are held at the Bristol Records Office
https://www.bristolmuseums.org.uk/bristol-archives/Holds a Will for Samuel FISHER Jnr. of
HENBURY - Yeoman - 1809
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Philmore published in 1912
Full Text of Gloucestershire Parish Registers Marriages
https://archive.org/stream/gloucestershirep16phil/gloucestershirep16phil_djvu.textfor Henbury (second bottom marriage on Page numbered 48
William FOWLES married Jane FISHER : 27 March 1749
(to move from page to page - just click the page)
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Forest of Dean Family History
http://www.forest-of-dean.net/Under Resources Heading
Gloucestershire Marriage Allegations and Marriage Bonds
Lists 4 FOWLER marriages in Charfield
(not sure if you have this) inc
two records both dated 15 Jan 1804 (this is a combination of both records - No. 10770 and 71406
Samuel FISHER aged 21 - Batchelor farmer of Olvaston
Mary FOWLER - aged 17 - Spinster of Charfield
father: William FOWLER - farmer
He signs
Witness 1: William FOWLER a Farmer of Wotton Under Edge
The groom and William FOWLER are bound in the sum of £500 to marry at Charfield
Memorandum
To marry at Charfield; At the same time appeared before me William FOWLER of the Parish of Wotton Underedge farmer; made oath that he is the lawful father of the above Mary Fowler of the Parish of Charfield and freely consenting to her marriage with the aforesaid Samuel FISHER.
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If you Googe:
Some Memorial Inscriptions, Olveston, Gloucester
some FISHERs including
Samuel FISHER (Snr) of this Parish 1792 date 66 and Sarah W - 6 May 1808 aged 86
It was a common practice for farming families to inter-marry to keep land in the family