Searching for information on:
1) Elizabeth Longfield who married Daniel Crean @ St Finbar's Church, South Parish, Cork on 26/06/1822.
2) their children - Mary, Elizabeth, Harriet & Robert.
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I searched on www.irishgenealogy.ie and saw the baptismal records for Harriet and Robert and the 1822 marriage record. The only Elizabeth Longfield baptismal record was in late 1809 and I don't think that Elizabeth married at 12 1/2 Did the family stay in Ireland?
You can try to locate the other baptismal records on the St. Finbar's parish register http://registers.nli.ie/parishes/0040
Roger McDonnell