Bit of a long shot but you never know, on Cornwall OPC there is a baptism 5 miles from St Clement at Veryan 6 Jan 1802 parents Francis & Blanch. Siblings Maria 1 Jul 1798, John 27 Jun 1784, William 5 Mar 1786, Mary 6 Oct 1793 all bap Veryan.
Looks like Francis senior married Blanch Bennet(t) in Probus either 1 Aug or 10 Oct 1783 (familysearch.org pilot site England marriages)
If it's not right at least it rules another parish out!
Shirl