Within a day or two of this outrage the British steamer _Glengyle_ was also sunk in the Mediterranean, but happily all the passengers were saved. In the North Sea we had got the submarine danger well in hand, but in the far more extensive Mediterranean the enemy remained powerful for mischief down to the close of the year.
[Footnote 19: For an account of the Narrows, see Chapter XX.]
[Footnote 20: _Blackwood's Magazine_, October 1915.]
WINTER FIGHTING IN POLAND AND EAST PRUSSIA.
In chapter XXIX. of our third volume I told you how von Hindenburg's second attempt on Warsaw was foiled, and how the Russians during the last days of December 1914 stood firm on a front of great strength. At the beginning of the year 1915 the Russian front extended from the Baltic Sea right to the border of Rumania--a distance of at least nine hundred miles. In January 1915 the Russians were holding the longest battle front ever known in the history of the world.
We may divide this very extended battle front as Cæsar divided Gaul--into three parts. The trenches in the central or Polish zone ran from the mouth of the Bzura, on the Middle Vistula, to the Upper Vistula, at its confluence with the Donajetz, in a fairly straight line, for a distance of about two hundred miles. On either side of this central zone there were two wings which differed greatly in character. Both were bent back from the line of the central zone: the north or right wing followed a sickle shape through a region of lake and marsh from the Baltic to the Vistula, and was for the most part within the East Prussian frontier; while the south or left wing ran from the Upper Vistula to follow the line of the Carpathians.
We will now learn something of the fighting which took place in the first three months of the year 1915 on the north or right wing. For the first few weeks there was ordinary trench warfare such as was going on in the West. Attacks and counter-attacks were frequent, but there was no action of any great importance. Most of the attacks were made by night, beneath the light of rockets and star-shells and the glare of searchlights. On the Bzura River the trenches of friend and foe were only sixty yards apart, and in this section of the line the Germans tried a very ingenious method of breaking down the Russian wire entanglements. They filled barrels with clay, and rolled them down the slopes towards the Russians, who believed that men with wire-cutters were hiding behind the barrels and pushing them forward. They therefore flung their hand grenades at the barrels, only to discover that they were moving by their own weight, and that there were no men behind them. When the Russians had thus exhausted their supply of hand grenades, the Germans pushed forward and tried to rush the trenches. They were only beaten off after a furious struggle. Shells and bombs containing poison gases were also used by the Germans on this part of the line.