« Reply #4 on: Tuesday 19 April 11 19:20 BST (UK) »
the Cornwall Family History Soc is also in Truro
http://www.cornwallfhs.com/but why not see what comes of checking the original marriage entry first? It doesn't cost very much as you have the date & parish, so you're not paying for research, just for photcopying. Think there may be a minimum payment so you could probably get the baptisms for the children & Mary's remarriage for the price. The archives will research for you for a price, but start with the marriage entry, with fingers crossed.
Unfortunately, both Newlyn & Paul are without opcs at the moment, although there is a contact for the interim.
http://www.cornwall-opc.org/Par_new/parishes.php
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