me again
There is quite a bit about court cases :
http://www.nationalarchives.gov.uk/catalogue/RdLeaflet.asp?s...however, I am in Spain and unable to get to the NA for you to look (might be worth a shot to do a completely new message asking if someone can help you on this and, as you have a very narrow time frame 1852/53 - you never know!)
Saying all that, if he was only fined then it must have been a very minor charge however, the stigma in those days would have been great for a man of his standing (he had a few servants listed on the census) and this prob. was the cause of his leaving rather than anything else.
did find:
WILLIAM DOWNING
Spouse: MATILDA ANN MATHEWS
Marriage: 29 APR 1830 Stoke Damerel, Devon
Extracted Record Ref:
M052421 1829 - 1837 0916927 Film
which may hold further info - you will need to view this at a FRC near you (see online for your nearest). However, do bear in mind that parents were not obligued to be listed pre 1837 but the witness's can oftentimes be helpful. Also, his middle name could well be his mothers maiden name, which was very common back then so, keep that in mind also.
A copy of Matilda's death certificate might also hold some info (on her) so well worth getting (online at £7 incl of w/wide postage)