Capture by the French of the summit of Hartmannsweilerkopf, a spur of the Vosges thrust out towards Mulhausen. The Germans had transformed the summit into a fortress. A British ship, the Vosges, sunk by shell-fire from a German submarine in the Channel, after a chase which lasted two hours. The chief engineer was killed. German aeroplane attack on Calais, damange insignificant.