Shortly after six a.m. on the morning of 22nd July, a large number of officers assembled at the Abbassieh ranges to watch the result of the experiments of the sham bombardment. Lieutenant-General Sir Francis Grenfell and staff, Major-General Lyttelton, and many others were present. It was arranged that the new 5-inch howitzer battery, with the "Lyddite" or high explosive shells, was to make the first attempt to breach or throw down the wall. There were six of these new howitzers, and they were worked by the 37th Field Battery, commanded by Major Elmslie. Except that the bore was larger, there was little to distinguish the pieces from the 15-lb. Maxim-Nordenfeldt automatic recoil guns used at the battle of the Atbara. The latter cannon, however, only used cordite, whereas the 5-inch howitzer shells are filled with a picric compound resembling M. Turpin's melinite. For over ten years Russia has had 100-lb. howitzer batteries in the field, firing high explosives. It was the Sirdar who insisted upon the necessity of being supplied with these light and handy cannon. Neither the velocity nor the range of their shell-fire is great, but it is enough--4000 yards or thereby--for all practical purposes, and is fairly accurate. The explosion of the picric shells was very violent, and the danger area about 300 yards from where they burst. It has been found that, with about six or eight mules to draw the guns, the battery was quite mobile. Egyptian drivers were employed, though the men serving the guns were all British artillerymen. Even the drivers of the 32nd Field Battery, commanded by Major Williams, had "gippy" teamsters. Both batteries were drawn by smart Cyprus mules. The howitzers opened fire at 750 yards from the wall. With few exceptions, the Lyddite shells hit the mark. Range is given more by increase or diminution of the charge than elevation or depression of the howitzers. The guns kicked viciously and ran back at each discharge. Bursting violently, the shells threw out big sheets of tawny flame, followed by showers of stones and a cloud of dust and brownish smoke. It was possible to see the missiles in their flight and note where they struck. As each shell rushed through the air it made a noise not unlike an express train passing under a bridge. There were salvoes of two or three guns, and huge chunks were knocked out of the wall. Pieces of flying debris frequently dropped at no great distance from the gunners. It was plain that the shells were bursting upon impact, and only blowing away the face of the wall to the depth of but a foot or two. Had there been thick shells with retarding fuses the structure might have been breached in two or three rounds.