In practical terms, this meant that Crooke became the king's printer and held a monopoly on the printing, binding, and selling of books in Ireland.
[3] Crooke operated from three premises in Dublin, Castle Street from 1670 to 1678, from King's Printing House, Skinner Row from 1678 to 1683, and then from Ormond Quay from 1683 to 1685.
Crooke's printing output was prodigious and her standards were low, while maintaining the business for her sons and resisting rival printers encroaching on her markets.
She filed a petition against Thomas Bladen, who was forbidden to print, to the lord lieutenant in 1671, leading to his press being appropriated by the king's printer by order in 1673.
Andrew filed two bills against Crooke on 3 November 1684 in the court of exchequer to negotiate for the patent rights of the king's printer.