But they are not the people I am looking for and cannot reconcile their entry with the newspaper report in St James' Chronicle for July 28 1768.
St. James's Chronicle or the British Evening Post (London, England), July 28, 1768 - July 30, 1768; Issue 1157.
Married.] ... The same Day,* at Margaret's Church, Westminster, Sir William Best, Bart. of Downing-Street, to Miss Jackson, of the same Place.
* = Thursday 28 July 1768
(from the Burney Collection of 17th-18th Century Newspapers -- image accessed online via Gale Cengage Learning)