"Ireland Civil Registration Indexes, 1845-1958," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FRF5-2NR : 10 March 2018), DEATHS entry for John Leyden; citing Carrick On Shannon, Jan - Mar 1909, vol. 3, p. 42, General Registry, Custom House, Dublin; FHL microfilm 101,604.