"Ireland Census, 1901," database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:QPBT-XJMZ : 11 March 2022), Bridget Leyden in household of John Leyden, Cregga, County Roscommon, Ireland; citing Census, Cregga, County Roscommon, Ireland, 0000638244, Public Record Office of Ireland, Belfast.