Can anyone advise how I might find birth/baptism details of John MOORE, school teacher, b. abt 1843 IOM, died March qtr, Burnley, Lancashire, England?

John MOORE married my ggreat aunt Francis Elizabeth MOORE, nee FLACK, (b. 4 November 1847 Chatham, Kent), Sept Qtr 1874, at Burnley, Lancashire.

Were his parents Irish from Co. Cavan?