[kiterunner]

Okay, this looks likely to be her baptism:
30 Sep 1793 Mary daughter of Richd and Elizth Eato baptized.


So then I had a look through for other Eato stuff and found:
25 Dec 1774 Richard Eatto the son of Richard and Mary baptised
16 Feb 1777 Baptised Ann Eatto the Daughter of Richard and Mary
19 Jun 1779 Baptised John Eatto the son of Richard and Mary his wife
1 May 1783 Baptised Mary the Daughter of Richard Eato and Mary his wife
20 Mar 1785 Baptised Anthony Eato the son of Richard & Mary his wife
29 Apr 1785 Buried Mary Eato
2 Mar 1788 Baptised Mary Eato the Daughter of Richard & Elisabeth Eato his wife
4 Mar 1788 Buried Mary Eato
23 Aug 1789 Baptized Hannah Daughter of Richd & Elizth Eato
31 Mar 1791 Baptiz'd Joseph Son of Richd and Elizth Eato
24 Dec 1794 John Eato buried
11 Oct 1795 Thomas son of Richard and Elizabeth Eato was baptized
23 Jun 1797 Thomas Eato was buried
2 Sep 1798 William, son of Richard & Elizabeth Eato baptized
7 Sep 1800 George son of Richard & Elizabeth Eato baptized
6 Dec 1800 George, son of Richard & Eliz Eato buried (BT's give surname as Eatoe)
21 Oct 1802 Eliz Eaiton buried (couldn't find it in BT's to check surname)
3 Jan 1809 Elizabeth Eato buried
10 May 1812 John Eato, son of Richard & Christina, baptized (born Apr 10)

Baptisms post-1813:
20 Mar 1814 Elizabeth daughter of Richard and Christiana Eato of Langford, labourer
28 May 1815 Alice, same info
9 Feb 1817 Charles, son, same info
21 Jun 1818 Job, son of Richard and Christiana Eteo of Langford, laborer
6 May 1821 Reuben son of Richard & Christiana Eato of Langford, labourer

I was hoping to look at the various Richard Eato marriages to see if they could all be the same Richard or not, but the only one I could find at Langford was this one, from Phillimore's:
23 Jan 1772 Richard Eatto and Mary Donson

I didn't look at the actual entry for that one yet. I did notice another possible variant on the surname while looking through the other parishes in that volume of Phillimore's: Etough (at South Collingham, but that was a John Etough).

If we can find a Richard Eato / Elizabeth marriage around 1785 - 1788 and a Richard Eato / Christiana marriage around 1802 - 1812 I'll have a look at them next time I go to see if they all look like the same Richard or not. I did have a look at the wills index and there were no Eato(e)s or Heato(e)s listed.