A Norman French royal writ (4 Ed. II) commanding the bailiffs and officials of Sutton-on-the-port of Plymouth to send a well-equipped naval fleet to the Isle of Man and thence to Scotland in support of the Crown's war effort. The fleet is to be placed under the command of Simon de Mountaigne, designated Admiral of the royal fleet. This document illustrates medieval royal naval administration and the strategic importance of the Isle of Man as a naval staging post.