737 burials at Durham St. Margaret’s chapelry in the parish of St. Oswald, spanning 1787-1797.  Ages started appearing regularly in Oct 1795. Some samples:

• 17 Apr 1787 Sarah Atkinson, wife of Richard Atkinson
• 12 Jan 1790 Mary Williamson, commonly called Ragg Mary, pauper
• 7 Jul 1791 Mary Bilton, age: 104, widow, P [= poor]
• 4 Feb 1794 Cornelius Gleeson, age: said to be 105 old
• 12 Jul 1795 Gilbert Cornforth, son of George Cornforth & Margaret
• 21 Mar 1797 Samuel Dutton, age: 35, private soldier in the Surrey Militia, killed in a quarrel at the Grey Hound
• 10 Dec 1797 Elizabeth Wilkinson, age: 77, wife of Robert Wilkinson

These are from a combination of the parish register and the Bishop’s Transcript. Specifically, from the BT are Mar 1787-Mar 1788, Mar 1791-Mar 1792, 1794, 1796-97. From the parish register: Mar 1788-Mar 1791, Mar 1792-1793, 1795.