Mary was born in 1737 in Nantwich and her christening took place there on March 12th, 1737.1
Birth Notes
MARY BRERETON Birth: Christening: 12 MAR 1738 Nantwich, Cheshire, England Parents: Father: SANDFORD BRERETON This appears to be incorrect as image is for previous year.
The linked 1738 Record record for March shows: "Margared daughter of Sandford Brereton Hatter ... 18". There is no record for a Mary (or anyone else) on the 12th March, even though its on the transcription.
also
Event Type Christening Event Date 12 Mar 1737 Event Place , Nantwich, Cheshire, England Gender Female Father's Name Sandford Brereson
The image (lower right corner) of the Nantwich register for 1737 shows "Mary Daughter of Sandford Brereton Hatter" but there is no date (as corner of the page is damaged), so the 12th muse be from anotheer copy. (Mary was buried 19/05/1739)
Diocese of Chester parish registers of burials c1538-1910 Image Event Type Burial Event Date 19 May 1739 Event Place Nantwich, Cheshire, England Gender Female Father's Name Sanford Brereton Text: "Mary daughter of Sandford Brereton Hatter"