Christmas Day passed off without a shot being fired by either side in that part of the line. This does not appear to have been the result of any definite agreement, but simply a tacit understanding on the part of both forces to refrain from firing during that day. Many experiments were made with mortars and bombs at Bac-St.-Maur. Officers who were present afterwards asserted that they infinitely preferred the enemy's shot and shell to the uncertain and erratic explosions during these experiments. The new trench mortar had a way of moving round and facing the wrong way after one or two shots had been fired, which was disconcerting. Though the art of bomb-throwing was still in its infancy, the importance of this form of trench warfare had already impressed itself on every one in France. The Ordnance at home was confused by the many recommendations that were made, and issued bombs of every pattern, in order to ascertain by practical means which was the best; but as every brigade favoured a different bomb, the selection became a matter of great difficulty. In every brigade a company of 150 bomb-throwers was formed, and the men were thoroughly trained. Second Lieutenant Rhys Williams was selected to command the company of bomb-throwers in the 20th Brigade. Towards the end of December the constant heavy rain had played havoc with the trenches. The whole country had become completely water-logged, and as soon as water was pumped out of one portion of a trench it broke through in another. The Germans were in the same plight, and could be observed at pumping operations daily. It was impossible to dig any trench below a depth of two feet, and in some places it became necessary to build breastworks over the ground. One of the great difficulties the men in the trenches had to contend with was that the rifles during an attack were rendered useless by the mud. Whenever an attack was made the rifles became so clogged with mud that the men had nothing but the bayonet to fight with. To carry 200 or more rounds of small-arms ammunition all through the day, and then find they are merely ornamental when the fighting begins, is rather disheartening, and the Divisional Authorities therefore devised a rough canvas cover to slip over the muzzle of the rifle. This cover could be pulled off instantly when required, but even if the rifle was fired with the cover on no harm was done. A letter found on a German colonel some months later revealed the fact that the enemy had been much struck with the idea of a cover of this sort, and had taken steps to have one made on the British pattern. The following letter from His Royal Highness the Duke of Connaught, Colonel of the Grenadiers, and at the time Governor-General of Canada, was forwarded for the officers of the Battalion to read: [Sidenote: Jan. 1915.] GOVERNMENT HOUSE, OTTAWA, _January 12, 1915_. MY DEAR STREATFEILD--Most grateful thanks for three letters of the 23rd, 29th, and 30th of December.