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Male Clark Fierce Click to view Clark Fierce in the family tree

Clark was born about 1849.1   Clark's father was Thomas Butcher Fierce and his mother was Mary MacCartney.  His paternal grandparents were John Fierce and Catherine Miller; his maternal grandparents were John MacCartney and Sarah Jane Jones. He had five brothers and five sisters, named William Wallace, Henry, Hiram, Lewis, Charles, Louisa, Catherine, Sarah, Matilda and Mary Theresa.  He was the third youngest of the eleven children.1 

1 phelps.FTW
Further sources/citations:
World Family Tree Vol. 4, Ed. 1 @ Tree #1353, 1353.ftw