Hello Pansy, I am afraid I can find no sutiable death online, I searched the civil death record even under James here and nothing to see, there is no sign of him on the Irish Census of 1901 or 1911 either but the search does not bring back variants etc the civil records are free here https://www.irishgenealogy.ie/en/ from 1864 to 1970, sign in but free. The census is also free to view if you search for it.
Why was he in Dublin, did he work here full time etc or could he have died at sea or some such, a search on Ancestry brought back a baptism of a Trippette but in 1861 or so. If he died in an accident or such there may have been an inquest etc and a search of the papers might yield a report but it is unusual as deaths at sea are recorded etc.
Sorry cannot be more helpful but it remains a mystery, if you have any more info even his age or if married etc but the name is so unusual here that it should jump out of a search, mind you some site do not go that far forward, have you tried the free Family Search site. They done there own copying but they are on pay sites too but often come further into recent times.