Yes Frances I agree with you... the marriage was feb 1768 not 1778 as recorded in Brians records. I was posting to correct the wrong parent family that is stated in this publcation.
This is what I have on the later generation. Viv may have more on this family.

William Quine (junior) born before 1752 d 1804
married 16 Feb 1768 to Margaret Halsall
children
William baptised 23 Jul 1780 (d 1814? possibly married Esther Martin?)
John b 18 Aug 1782
Philip b 21 Nov 1784 [possibly married Ann Shimmin]
Robert b 29 Apr 1787 (not mentioned in fathers will)
Daniel Quine baptised 19 Sep 1790 (not mentioned in fathers will)
Thomas
Christian Quine b 08 Nov 1772 married James Kennaugh
Ann Quine b 18 May 1777