George Brockbank was estimated to be born about 1765 being 21 years prior to his marriage.
He married Ann Pedder on the 30th October 1786 a St John's church in Preston.
https://www.lan-opc.org.uk/Preston/Preston/stjohn/marriages_1786-1791.html Transcript; Marriage: 30 Oct 1786 St John, Preston, Lancs. George Brockbank - this parish Ann Pedder - (X), this parish Witness: Molley Shaw; Henry Clitheroe, (X) Married by Banns by: John Nicholson. Curate Register: Marriages 1786 - 1791, Page 207, Entry 618 Source: LDS Film 94013