Census of Ireland, 1871. Alphabetical index to the townlands and towns of Ireland, showing the number of the sheet of the ordnance survey maps on which they appear; also the areas of the townlands, the county, barony, parish, poor law union, and poor law electoral division in which they are situated; and the volume and page of the census of 1871, part I., which contain the population and number of houses in 1841, 1851, 1861, and 1871, and the poor law valuation in 1871; with separate indices of the parishes, baronies, poor law unions (or superintendent registrars' districts), poor law electoral divisions, dispensary (or registrars') districts, petty sessions districts, and parliamentary boroughs of Ireland [electronic resource].