sentences:  By this time the Commander estimated that the destroyer was about thirty miles astern of the convoy, which meant that they had to speed up in order to reach the ships.Captain Hill then sent a message to Admiral Burrough, 'Interrogative STOP rejoin or go home'.When the signal rating brought in Burrough's reply it became apparent that the signal groups had been received corruptly, since the admiral was apparently ordering "Ledbury" to "proceed to the Orkney and Shetland Islands".