« Reply #3 on: Tuesday 23 May 17 09:17 BST (UK) »
one of the problems with Redruth records from that time as that we are reliant on transcripts, scans aren't available on FamilySearch. There are a few other After records, but they look like they should be Arthur.
Baptism Mary After 14 march 1779, dau of Henry & Mary, fits in the gap between Thomas Arthur bp 2 Feb 1777 and Henry bp 25 Dec 1781. Henry Arthur married Mary Harry 30 Nov 1776 all Redruth.
Baptism in Redruth Jane After 23 Apr 1780 daughter of William & Elizabeth, William & Elizabeth Arthur have more children baptised in 1783, 1786 & 1793 in Redruth and 2 in Illogan in 1775 & 1777.
Baptism in Redruth John After 5 May 1792 son of John & Mary, daughter Jennifer Arthur bp 4 may 1788, John Arthur married Mary Nicholas 28 Jan 1788 in Redruth.
There's a baptism in Camborne 10 Nov 1755 of Elisabeth Arthur daughter of David that may be a possible. Two older siblings also bp in Camborne William 1 April 1753 & John 16 June 1751.
Cornwall: Allen, Bevan, Bosisto, Carnpezzack, Donithorn, Huddy, James, Retallack, Russell, Vincent, Yeoman
Cards: Thomas (Llanbadarn Fawr)
Glam: Bowler, Cram, Galloway, James, Thomas, Watkins
Lincs: Coupland, Cram
Mon: Cram, Gwyn, John, Philpot, Smart, Watkins
Pembs: Edwards (St. Dogmael's)
Yorks: Airey, Bowler, Elliott, Hare, Hewitt, Kellett, Kemp, Stephenson, Tebb