The North Army consisted of the 1st A.C. and the 7th Division, supported by the 3rd Cavalry Division, and the southernmost point in its charge at the moment was Hollebeke, or, to be more precise, the canal which turns off sharply towards Ypres just north of Hollebeke. The eight miles gap between the North Army and the South Army was held by the Cavalry Corps under Allenby. The terrific fighting, then, of the end of October and beginning of November may be considered as taking place in three distinct sections, viz.--the South Army, the Cavalry Corps, and the North Army. The latter, it may be added, had the 89th French Territorial Division in support, and Gen. Bidon, with the 87th French Territorial Division, on its left, north of Ypres. The fact that the 1st A.C. had arrived on the scene absolutely at the psychological moment in order to avert disaster, was made abundantly clear, not only by the effective support which the 2nd Division of that Army Corps was able to lend north of the Zonnebeke road on the 21st, but also by the immediate demand which arose further south for the services of the released 3rd Cavalry Division. These two Cavalry Brigades, it will be remembered, had been replaced on the night of the 20th by the 2nd Division, who had taken over their position north of the Zonnebeke road. At 1 p.m. on the following day, that is, at the same time that the Welsh Fusiliers were being so fiercely attacked along the Zonnebeke road, news arrived that Gough's 2nd Cavalry Division was being very hard pressed, and had been forced to fall back on Messines. This left a gap, or--to be more accurate--widened the gap on the right of the 7th Division at Zandvoorde, and the 6th C.B. (10th Hussars, Royals, and 3rd Dragoon Guards) were sent off to fill it, as well as might be, by occupying the two canal crossings north of Hollebeke. This they did with success, and the 10th Hussars and 4th Hussars (from the 3rd C.B.) even attacked the Château de Hollebeke itself, but were unable to take it, on account of its being still under fire from our own artillery. Later on in the evening, however, it was felt that the line south-west of Zandvoorde was dangerously open, and the 6th C.B. was shifted in that direction, the 10th Hussars at 3 o'clock in the morning taking over the Zandvoorde trenches from the 2nd Scots Guards in the 20th Brigade. The 7th C.B. went into reserve at St. Eloi, where it remained for the night. In the meanwhile the C. in C. had sent up the 7th Indian Brigade to help support Gough.