Hi Emsworthy, I’m sorry that I can’t help with locating a baptism closer to the 1761-66 period you’re interested in, but I did look at options and hope that the following is of some interest, if you don’t already have it.
In case you don’t have it for your records, I see that Robert and Martha were married at St Luke, Farnworth rather than Prescot town itself, which would normally be at St Mary the Virgin.
http://www.lan-opc.org.uk/Search/indexp.htmlMarriage: 3 Feb 1789 St Luke (formerly St Wilfrid), Farnworth (Widnes), Lancashire, England
Robert Grice - (X), Husbandman, Farnworth near Prescot
Martha Holding - (X), Spinster, Farnworth near Prescot
Witness: John Hall; Peter Shaw
Married by Banns by: Thomas Moss Minister
Register: Marriages 1781 - 1812, Page 55, Entry 978
Source: LDS Film 1655235 item 4
If Robert was born 7 Feb 1770 (as per baptism record) and married 3 Feb 1789, he would have been just under 19 years of age, whilst Martha was 21? I’ve only seen the transcript of their marriage but there is no mention of Robert being a minor, if that was the requirement at that time.
https://www.british-genealogy.com/forum/archive/index.php/t-8613.html“As for parental consent this was only briefly required between 1753 & 1823 before this and after consent should be obtained but the marriage was neither void nor voidable if no consent had been obtained.”
I wonder if another RootsChatter can confirm the requirements for registering of a ‘minor’ at marriage in 1789.
Quite sad that on their marriage in 1789 Robert is recorded as a ‘Husbandman’ but by the birth of their first child John in 1790, he is recorded as a ‘Pauper’. Wonder what happened there?
In the 1841c Robert and Martha are living on Stocks Lane and it looks as if son Richard aged 33 with his family were living close by on Meeting Lane?
Stocks Lane, Warrington to St. Luke's Church, Pit Ln, Widnes WA8 9HU - Google Maps
https://www.google.co.uk/maps/place/Stocks+Ln,+Warrington/@53.3866377,-2.6642006,15.25z/data=!4m5!3m4!1s0x487b02c608485641:0x4b3454001036be6f!8m2!3d53.3877638!4d-2.6643068https://maps.nls.uk/view/101104388https://maps.nls.uk/view/102344129I hope someone else is able to help further.
Kit
Edit: sorry but the links are not working. I'll see what I can do to amend that.