Gardiner Family of Gorwan

My great grandmother, Mary MGardiner wasborn in Gorwan in 1875 andleft for New York City in 1895. She married John Henry Kane in 1898, and they lived in Brooklyn, where John HKane worked as a printer. The family moved to Princeton, New Jersey--the town where John HKane had grown up--after the birth of their second child in 1905. Their first child, Daniel Walter Kane, was my grandfather. I believe that Mary Gardiner's parents were James Gardiner and Margaret Holohan, and that some of Margaret Holohan's brothers and sisters--and perhaps her parents--left for America in the 1860s. Would welcome any additional information--or suggestions on where to search next.