pax regis

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
PAX REGIS, Eng. law. The king's peace. In ancient times there were certain 
limits which were known by this name. The pax regis, or the verge of the 
court, as it was afterwards called, extended from the palace gate to the 
distance of three miles, three furlongs, three acres, nine feet, nine palms 
and nine barleycorns. Crabb's C. L. 41. 
    

[email protected]