From Ginchy the crest of the high ground runs northward for 2,000 yards, and then eastward, in a long spur, for nearly 4,000 yards. Near the eastern extremity of this spur stands the village of Morval commanding a wide field of view and fire in every direction. At Leuze Wood my right was still 2,000 yards from its objective at this village, and between lay a broad and deep branch of the main Combles Valley, completely commanded by the Morval spur, and flanked, not only from its head northeast of Ginchy, but also from the high ground east of the Combles Valley, which looks directly into it. [Sidenote: The French near Combles.] Up this high ground beyond the Combles Valley the French were working their way toward their objective at Sailly-Saillisel, situated due east of Morval, and standing at the same level. Between these two villages the ground falls away to the head of the Combles Valley, which runs thence in a southwesterly direction. In the bottom of this valley lies the small town of Combles, then well fortified and strongly held, though dominated by my right at Leuze Wood and by the French left on the opposite heights. It had been agreed between the French and myself that an assault on Combles would not be necessary, as the place could be rendered untenable by pressing forward along the ridges above it on either side. [Sidenote: Difficulties in way of French advance.] The capture of Morval from the south presented a very difficult problem, while the capture of Sailly-Saillisel, at that time some 3,000 yards to the north of the French left, was in some respects even more difficult. The line of the French advance was narrowed almost to a defile by the extensive and strongly fortified Wood of St. Pierre Vaast on the one side, and on the other by the Combles Valley, which, with the branches running out from it and the slopes each side, is completely commanded, as has been pointed out, by the heights bounding the valley on the east and west. [Sidenote: Close cooperation necessary on right.] On my right flank, therefore, the progress of the French and British forces was still interdependent, and the closest cooperation continued to be necessary in order to gain the further ground required to enable my centre to advance on a sufficiently wide front. To cope with such a situation unity of command is usually essential, but in this case the cordial good feeling between the allied armies, and the earnest desire of each to assist the other, proved equally effective, and removed all difficulties. [Sidenote: Enemy defense on main ridge over Thiepval.]