Gen. Macbean, with the Secunderabad Cavalry Brigade, Second Battalion, Eighth Gurkha Rifles, and the Forty-seventh Sikhs, was sent up to support Gen. Brunker, who, at 2 P.M., directed Gen. Macbean to move to a position of readiness in the second line trenches from Maris northward, and to counter-attack vigorously if opportunity offered. Some considerable delay appears to have occurred, and it was not until 1 A.M. on the 21st that the Forty-seventh Sikhs and the Seventh Dragoon Guards, under the command of Lieut. Col. H.A. Lempriere, D.S.O., of the latter regiment, were launched in counter-attack. They reached the enemy's trenches, but were driven out by enfilade fire, their gallant commander being killed. The main attack by the remainder of Gen. Macbean's force, with the remnants of Lieut. Col. Lempriere's detachment, (which had again been rallied,) was finally rushed in at about 4:30 A.M., and also failed. In the northern section of the defensive line the retirement of the Second Battalion, Second Gurkha Rifles, at about 10 A.M. on the 20th, had left the flank of the First Seaforth Highlanders, on the extreme right of the Meerut Division line, much exposed. This battalion was left shortly afterward completely in the air by the retirement of the Sirhind Brigade. The Fifty-eighth Rifles, therefore, were ordered to support the left of the Seaforth Highlanders, to fill the gap created by the retirement of the Gurkhas. During the whole of the afternoon strenuous efforts were made by the Seaforth Highlanders to clear the trenches to their right and left. The First Battalion, Ninth Gurkha Rifles, reinforced the Second Gurkhas near the orchard where the Germans were in occupation of the trenches abandoned by the latter regiment. The Garhwal Brigade was being very heavily attacked, and their trenches and loopholes were much damaged; but the brigade continued to hold its front and attack, connecting with the Sixth Jats on the left of the Dehra Dun Brigade. No advance in force was made by the enemy, but the troops were pinned to their ground by heavy artillery fire, the Seaforth Highlanders especially suffering heavily. Shortly before nightfall the Second Royal Highlanders, on the right of the Seaforth Highlanders, had succeeded in establishing touch with the Sirhind Brigade; and the continuous line (though dented near the orchard) existed throughout the Meerut Division. Early in the afternoon of Dec. 20 orders were sent to the First Corps, which was then in general army reserve, to send an infantry brigade to support the Indian Corps. The First Brigade was ordered to Bethune, and reached that place at midnight on Dec. 20-21. Later in the day Sir Douglas Haig was ordered to move the whole of the First Division in support of the Indian Corps. The Third Brigade reached Bethune between 8 A.M. and 9 A.M. on the 21st, and on the same date the Second Brigade arrived at Lacon at 1 P.M.