Only one marriage showing in Chirk in the 1813-1837 period. They are both showing as being b. Chirk so this would be the most likely. Other parish that they might have married would be Llangollen, Ruabon or St Martins - all close by. I've had a quick look but don't see anything in Ruabon or Llangollen. St Martins' marriages are on the IGI - Batch no M085801 Jones is not an easy surname to track down

Chirk
Marriage by licence2 Sept 1819 Samuel Jones (widr) and Mary Davies (sp, with con of par) .
Mary was under 21 when she married, so would be no older than her early 40s in 1841. She is noted as 45 (45 to 49 with rounding) on the census. There might be something in the marriage bonds at the National Library that gives more info on this -
http://isys.llgc.org.uk/ Select Marriage Bonds, enter one of the names. When the file names come up, select the St Asaph diocese ones.
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