"Ireland Civil Registration Indexes, 1845-1958," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FB6P-16T : 10 March 2018), BIRTHS entry for Samuel Walter Dudgeon; citing Limerick, Jan - Mar 1893, vol. 5, p. 333, General Registry, Custom House, Dublin; FHL microfilm 101,064.
"Ireland Census, 1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QYVR-YXMM : 27 December 2018), Samuel Walter Dudgeon in entry for William Dudgeon, 1911; citing Rhode, County Offaly, Ireland, Census, National Archives of Ireland, Dublin.