Career
Born circa 1850 in either Dunkineely, Donegal or Sligo, Ireland and died Christchurch, New Zealand in 1903. He emigrated to America at the age of 16. He became head of the Fenian Council in 1886 after a power struggle with O"Donovan Rossa in which Rossa accused him of being an agent provocateur for the British.
Cassidy was chiefly famous for his exposure of O"Donovan Rossa.
In 1892 he published a book entitled The Borrowed Bride: A Fairy Love Legend of Donegal.
