I just wondered, his children had all either died or married, his wife died, he disappeared from the electoral registers c 1928/29
so I checked on Irish Genealogy and have just seen a death register entry for a James Mooney who died in 1938, Dublin South
06 Jan 1938 , 75 Lower Leeson Street,
James Mooney, male, age 75, a widower occupation PLASTERER (ooh!) , cause of death chronic bronchitis & myocarditis, cardiac failure. His death was registered on 19th Jan 1938 by H. Mooney, sister, of 75 Lower Leeson Street.
and as its on Irish Genealogy.
http://www.irishgenealogy.ie/en/ that image is free to download
What do you think?
Boo