The French cavalry corps, under Gen. Sordet, was coming up on our left rear early in the morning, and I sent an urgent message to him to do his utmost to come up and support the retirement of my left flank; but owing to the fatigue of his horses he found himself unable to intervene in any way. There had been no time to intrench the position properly, but the troops showed a magnificent front to the terrible fire which confronted them. The artillery, although outmatched by at least four to one, made a splendid fight, and inflicted heavy losses on their opponents. [Illustration: Map 1.--Showing the early stages of the retreat from Mons, Aug. 22 to Sept. 1.] At length it became apparent that, if complete annihilation was to be avoided, a retirement must be attempted; and the order was given to commence it about 3:30 P.M. The movement was covered with the most devoted intrepidity and determination by the artillery, which had itself suffered heavily, and the fine work done by the cavalry in the further retreat from the position assisted materially in the final completion of this most difficult and dangerous operation. Fortunately the enemy had himself suffered too heavily to engage in an energetic pursuit. I cannot close the brief account of this glorious stand of the British troops without putting on record my deep appreciation of the valuable services rendered by Gen. Sir Horace Smith-Dorrien. I say without hesitation that the saving of the left wing of the army under my command on the morning of the 26th August could never have been accomplished unless a commander of rare and unusual coolness, intrepidity, and determination had been present to personally conduct the operation. The retreat was continued far into the night of the 26th and through the 27th and 28th, on which date the troops halted on the line Noyon-Chauny-La Fere, having then thrown off the weight of the enemy's pursuit. On the 27th and 28th I was much indebted to Gen. Sordet and the French cavalry division which he commands for materially assisting my retirement and successfully driving back some of the enemy on Cambrai. Gen. D'Amade also, with the Sixty-first and Sixty-second French Reserve Divisions, moved down from the neighborhood of Arras on the enemy's right flank and took much pressure off the rear of the British forces. This closes the period covering the heavy fighting which commenced at Mons on Sunday afternoon, 23d August, and which really constituted a four days' battle. At this point, therefore, I propose to close the present dispatch. I deeply deplore the very serious losses which the British forces have suffered in this great battle; but they were inevitable in view of the fact that the British Army--only two days after a concentration by rail--was called upon to withstand a vigorous attack of five German army corps.