Several writers on Irish population in the pre-famine period have suggested that detailed local studies are urgently needed to supplement the evidence from national data, such as the early census returns or the hearth tax lists, and to assist in clarifying elusive problems such as age of marriage, size of family, death-rate changes etc. It is often asserted, however, that the amount of detailed information relating to specific areas is limited and of poor quality; in particular, contrasts are drawn between the availability and usefulness of parish registers relating to pre-famine Ireland and those available to scholars in England, France and Scandinavia. Pre-famine parochial registers of burials, marriages and baptisms do nonetheless exist, and, although their use poses problems, there are indications that a good deal of useful information may be waiting to be uncovered.