Roger O'Carroll, son and heir of Sir Mulrooney, was ousted out of his Estates by Cromwell, he having attached himself to the King's party under the Duke of Ormond, but his eldest son and heir, Charles O'Carroll, was in great favour with Kings Charles II and James the I, who were not able to restore him to his paternal estate; the latter made him grants of large tracts of land on the Monoccasy River in the Province of Maryland in the North America, which was divided into three manors of 20000 acres each and called after the possession he had lost in Ireland, viz.,