I am trying to locate information on my ancestor Denis Dolan, date of birth about 1830, married to Mary Laughlin, and their daughter, Rose, my great grandmother, born 1859. I cannot locate any birth or Baptism record of Rose or Denis. Rose may have been born in Londonderry/Derry. Rose married Patrick McCollum/McCallum in 1879. There is a baptism record for Rose's son, Michael James McCollum/McCallum, indicating a witness named Honora Laughlin, and we do not know who Honora is. If anyone has information about the Denis Dolan line, we would love to know about it. Thanks.