This is a very sad day for us. There was a great sortie this morning against a village outside the Kabul Gate. We sent out 800 Infantry and 300 Cavalry under General BROOKE. They got into the village, and there they suffered considerable loss. The Fusiliers lost 2 Officers, Marsh and Wood, both young boys, 25 killed, and 29 wounded; the 28th one Officer, Colonel Newport, killed, and 30 killed and 19 wounded; the 19th 2 Officers, Major Trench and Lieut. Stayner, killed. Their return of men have not yet come in. Major Vandeleur, 7th Fusiliers, is badly wounded; Colonel Nimmo, 28th, dangerously; Colonel Shewell, of the Commissariat, wounded; Lieut. Wood, of the Transport, badly wounded; Captain Cruikshank, of the Engineers, killed; the Rev. Gordon, dangerously wounded; and last and worst, General BROOKE killed. I feel so sad about it, I can hardly speak, for I had learnt almost to love him, indeed I may say quite. He was shot through the head as he was carrying poor Cruikshank away from the village; and the worst of it is, that, in the opinion of many of us, this sortie was a quite useless waste of life. I believe we inflicted considerable loss of life on the enemy; but it was mere madness attacking with such a small force, a labyrinth of lanes and houses like that. BROOKE knew it, but could not protest, as he was ordered to command the Force. Burrows knew it, but he was not consulted. A man of the Fusiliers, whom I questioned about BROOKE'S death, says, the party he was with would never have got out of the village but for him. He is a great loss, for he was the best head we had, and I think the whole Force deplores his loss, nearly--though not quite as much as I do. When you write to B., let her and her husband know how he was loved, and how nobly he died. I cannot write any more. There is a great deal to be done; but no more sorties, I trust. We ought merely to have waited, but somebody got an idea we ought to do something. "Poor BROOKE was warned that he was going to certain death when he went back for Cruikshank, but he would go. Cruikshank was mortally wounded, and begged them to leave him and save themselves. BROOKE had ordered the Cavalry to cover the retreat of the Infantry, which was construed into an order to retire, and the consequence was that the Cavalry was withdrawn, and crowds of men rushed into the village, which had been kept in check on the far side of the Cavalry--even before our men were out of the village. I cannot tell you how I miss BROOKE, he was always so cheery and jolly, and had such sound views; he was the best head we had in the Force." In another letter he says, "BROOKE'S loss shows day by day more seriously; his cheery temper and sound views had the best influence.