It was a melancholy march, as the road all the way for sixteen miles was strewed with the Mexican dead. On a single spot I counted thirteen bodies; and at times the scent from the field was almost insupportable. After an exciting march, we pitched our tents near the spot which we left a week before; and part of the time since the enemy had occupied, whose fires were not extinct on our return. _March 14th._--We received orders last Wednesday to remove back to Buena Vista, as the water was so bad, and the wind and dust so disagreeable, that even our horses were affected, causing them to die off in great numbers. I was on guard the day before, and was not relieved till the next evening. To remain a whole day in the hot sun without shelter, and remain up all night in the cold wind, is a poor preparation for a hard march. The guard went in advance, and upon our arrival, were posted around the camp, which is situated on a ridge, sloping from the mountain. There we remained until the tents were pitched, and a new guard mounted. We have not yet forgotten the battle. Low spirits, gloom and regret are everywhere manifest. There are but few who have not to mourn the loss of friends and relations. Our wounded are all doing well, save Granville Jackson, the inflammation of whose hand has brought on a severe fever; and Alfred Goodwin, who, though badly wounded, may eventually be able to walk. Much controversy is going with regard to the retreat of the 2d regiment; but as it can easily be proved that Colonel Bowles gave the order, the matter will soon be favorably understood. But the subject gives us great trouble. If our reputation must suffer, it is, indeed, very discouraging. General Taylor, the adored of the army and the hero of many battles, has removed with Colonel May’s squadron of dragoons, Bragg’s battery of light artillery, and the Mississippi regiment, to Walnut Springs, near Monterey. We are still under the command of General Wool, who, although a brave and prudent officer, and a good soldier, falls below “Old Rough” in gaining the affection of the men.