Not until 1770, after O'Reilly had established Spanish rule by force at New Orleans, did a Spanish officer at St Louis take actual possession of the upper country; another on the ground, in 1768-1769, had forborne to assert his powers in the face of the unfriendly attitude of the inhabitants.
His first wife, Joan O'Reilly, was the mother of Calvagh, and two daughters, both of whom married O'Neills; the younger, Margaret, was wife of the famous rebel Shane O'Neill.
JOHN BOYLE O'REILLY (1844-1890), Irish-American politician and journalist, was born near Drogheda on the 28th of June 1844, the son of a schoolmaster.
At this period wholesale corruption of the army, in which there was a very large percentage of Irishmen, was a strong feature in the Fenian programme, and O'Reilly, who soon became a great favourite, was successful in disseminating disaffection in his regiment.
O'Reilly was arrested at Dublin, where his regiment was then quartered, tried by court-martial for concealing his knowledge of an impending mutiny, and sentenced to be shot, but the sentence was subsequently commuted to twenty years' penal servitude.