King's Counsel
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Barristers or serjeants who have bcen called within the bar and selected to be the king's counsel. They answer in some measure to the advocati fisci or advocates of the revenue, among the Romans. They must not be employed against the crown without special leave, which is, however, always granted, at a cost of about nine pounds.
3 Bl. Comm. 27.