it gives you a birth date for Flaxney and for Quayle !
It is possible that they were born off Island - it is interesting that neither the Obit nor the memoir re Flaxney actually state he was born in Castletown.

I could argue the definition of non-comformist with you (it has a technical meaning from late 17th C meaning that they disagreed with the Act of Comformity post restoration of the Monarchy) but the Methodists actually only officially broke away from Established Church in 1830's though in practice John Wesley's ordination of ministers for America was an act of disobedience. Many Parish Clerks were actually Methodist and as legal members of C of E could not be legally barred.
Roman Catholics were never non-comformists - until the catholic emancipation acts they were barred from many aspects of public life in Britain (though not on the Island).