JOHN P HIGGINS born 1858 Mayo-Died 1926 New Jersey

Hello
I am looking for more information on a John P Higgins who was baptised on 8 February 1858 at Kilmovee RC Church, County Mayo, Ireland. He was the son of Patrick Higgins and Mary Higgins (maiden name) who were living at Eggool?Uggool, Kilmovee at the time.
He was in New York in 1896 when his brother Patrick emigrated.from Liverpool on 20 May 1896 arriving New York on 31 May 1896 and was going to his brother John at 476, 48th Street, New York, USA.
On 24 February 1926 he and his wife (name unknown) both died tragically at home in Rahway, New Jersey, USA. They were buried on 3 March 1926 at Calvary Cemetery, New York.
How do I find the Death Certificate, Marriage and Cemetery Record.
I have Newspaper report of their Deaths in the Trenton Sunday Times of 28 February 1926..
Regards
Pat Berry