Due to the narrowness of no man's land and the winter weather, many casualties were anticipated during the embarkation. The untenable nature of the Allied position was made apparent by a rainstorm on 26 November 1915. The downpour at Suvla lasted for three days and there was a blizzard in early December. Rain flooded trenches, drowned soldiers and washed unburied corpses into the lines; the following snow killed still more men from exposure. Suvla and Anzac were to be evacuated in late December, the last troops leaving before dawn on 20 December. Troop numbers had been slowly reduced since 7 December and ruses, such as William Scurry's self-firing rifle, which had been rigged to fire by water dripped into a pan attached to the trigger, were used to disguise the Allied departure. At Anzac Cove, troops maintained silence for an hour or more, until curious Ottoman troops ventured to inspect the trenches, whereupon the Anzacs opened fire. This incident successfully discouraged the Ottomans from inspecting when the actual evacuation occurred. A mine was detonated at the Nek, which killed soldiers. The Allied force was embarked, with the Australians suffering no casualties on the final night but large quantities of supplies and stores fell into Ottoman hands.