In my summing up Sue and Donna please correct me if I am wrong:-
On Philips side first, The Philip Baptised on 15 May 1814, the true parents are William Quayle and Margaret Cowley of Ballaugh.

Mary Corkills parents are James Corkill and Mary Callow. b.c. 1793 Maughold and b.c. 1792 of Maughold.

Catherine Quayle had one illigetimate daug to J Corkill, so was Maria his or did she put her in her own name, or am I asking you to be Mystic Meg?

I also take it Donna you are fairly certain the Philip Quayle and Isabella and family you had in the 1851 Census is my correct ancestor, with the way that records are.

I had came across this 1851 Census a good while ago but being the amateur I am I dicarded it thinking they could!nt possibly be paupers, or been publicans. I always thought of them in the agricultural sense. This tells me I should keep all I find until absolutely certain, a lesson learned I hope. If I have got it wrong let me know. I am still going through all the information you have sent me.