Some more baptisms and burials, in case you don't have them:-
Ann, daughter of Reuben and Elizabeth, on 24th January 1768 at Wickenby
William, son of Reuben and Elizabeth, on 2nd July 1769 at Friesthorpe
Sarah, daughter of Reuben and Elizabeth, on 23rd August 1770 at Friesthorpe
buried on 6th Feb 1771 at Friesthorpe
Elizabeth, daughter of Reuben and Elizabeth, on 17th December 1771 at Friesthorpe
Susannah, daughter of Reuben and Elizabeth, on 20th April 1773 at Friesthorpe
Sarah,, daughter of Rubin and Elizabeth, on 14th August 1774 at Snelland
Mary, daughter of Reuben and Elizabeth, on 8th October 1775 at Snelland
Jane, daughter of Reuben and Elizabeth, on 1st November 1778 at Snelland
buried on 21st November 1794 at Snelland
Rebecca, daughter of Reuben and Elizabeth, on 19th March 1780 at Snelland
Susannah, daughter of Reuben Pearson, Blacksmith, and Susannah Mandefield, baptised on 20th July 1794 at Holton Beckering
buried on 10th December 1807 at Freiston
Charlotte, daughter of Reuben and Susanna, on 28th January 1795, at Freiston
George, son of Reuben and Susanna, on 11th September 1796 at Freiston
buried on 2nd October 1796 at Freiston
Maria, daughter of Reuben and Susanna, on 3rd September 1797 at Freiston
George, son of Reuben and Susanna, on 117th March 1799 at Freiston
buried on 8th April 1799 at Freiston
Reuben, son of Reuben and Martha, on 4th January 1801 at Freiston
Mary, daughter of Reuben and Susanna, on 3rd October 1802 at Freiston (born before marriage to Martha?)
David