Further to Elwyn's find, there are two deaths for Thomas Newell in https://civilrecords.irishgenealogy.ie/churchrecords/civil-search.jsp, aged 84 and 60 respectively for 1872.http://www.rootschat.com/links/01pp0/http://www.rootschat.com/links/01poz/As yet, there are no death records on-line pre 1878 on IrishGenealogy.ie, but hopefully in the not-too-distant future. However, you can order photocopies of the records.https://www.irishgenealogy.ie/en/civil-records/help/i-want-to-get-a-copy-of-a-certificate-what-do-i-doKG