Here's a few examples of mis-information:
III. If, after exhausting all American records, you have not determined the
place of origin in Ireland, there are several general indexes for Iteland
which could be consulted.
a. Civil Registration. 1845-present. Genealogical Society."
Civil registration of non-Catholic marriages only began in 1845. Registration of births, deaths and Catholic marriages began 1864. Although much later on the age the proper dates are given.
"and Offoly (Ua Failghe) formerly King's County" should be Offaly.
"C. 1831 Census gives names of inhabitants, relation to head, ages,
occupations, and information about the house and property. Some returns
are available for the following parishes in Londonderry County: Agevey,
Aghanloo, Arboe, Artrea, Benagher, Glendermot, Killowen, Macosquin,
Tamlaght-Finlagen, Templemore, and Termoneeny." Agevey should be Agivey, Benagher is Banagher and Aghadowey parish is not mentioned at all.
"G. 1911 census gives same information as the 1901 plus the number of years
married, total number of children born alive, and number of children still
living." this information is supposed to be given for married women only- widows and widowers were not asked these questions.
"C. Presbyterian. Records generally start about 1800 and all are extant. A
fairly complete listing will be found in Falley's book." some Presbyterian church records have been lost and many do not start until 1850s or later.