Bringing these children of Richard's and Mary's forward:
I have these baptisms to Richard Roberts and Mary, listed as living either Halton or Green Lane:
Maria Roberts bpt 20 August 1820
Harriett Roberts bpt 25 April 1824
Richard Roberts bpt 20 Aug 1826
Thomas Roberts bpt 3 Oct 1830
Also Richard's, age and place of birth in 1851:
Woodside Cottages (* only a few households away from Richard, jnr, and Martha)
HO107/1993/ 806/13
Roberts
Richard,widr, 68, coal miner, b. Salop, Oswestry
Harriett, d, 27
Thomas, s, 20
Robert, s, 5
All b. Chirk except Richard
Richard therefore born circa 1783-ish
The only baptism for a Richard Roberts showing in Oswestry around that time is the one that I mentioned before (IGI)
Oswestry 21 March 1785 (bpt. 23) Richard s/o John Roberts and Jane
I can't find a marriage for these two so far and Roberts is not the easiest is it

An interesting piece of info from the 1851 is that a Thomas and Charlotte Richards are living next door to Richard Roberts* on the 1851. Thomas was b. Ellesmere.
Gadget
*Too many Richards. I meant Richard Roberts, senior. Richard and Martha are on the next page
