160 A Young Officer in the War (1847)
I was with the earliest of the troops to enter the Mills. In passing through to the north side, looking towards Chapultepec I happened to notice that there were armed Mexicans still on top of the building, only a few feet from many of our men. Not seeing any stairway or ladder reaching to the top of the building, I took a few soldiers and had a cart that happened to be standing near brought up and placing the shafts against the wall and chocking the wheels so that the cart could not back, used the shafts as a sort of ladder extending to within three or four feet of the top. By this I climbed to the roof of the building followed by a few men but found a private soldier had preceded me by some other way. There were still quite a number of Mexicans on the roof, among them a major and five or six officers of lower grades who had not succeeded in getting away before our troops occupied the building. They still had their arms, while the soldier before mentioned was walking as sentry, guarding the prisoners he had surrounded all by himself. I halted the sentinel, received the swords from the commissioned officers and proceeded with the assistance of the soldiers now with me to disable the muskets by striking them against the edge of the wall and throw them to the ground below.
During the night of the 11th [September] batteries were established which could play upon the fortifications of Chapultepec. The bombardment commenced early on the morning of the 12th but there was no further engagement during this day than that of the artillery. General Scott assigned the capture of Chapultepec to General Pillow but did not leave the details to his judgment. Two assaulting columns, two hundred and fifty men each, composed of volunteers for the occasion, were formed. They were commanded by Captains McKinzie and Casey respectively. The assault was successful but bloody.
Worth’s command gradually advanced to the front. Later in the day in reconnoitering I found a church off to the south of the road which looked to me as if the belfry would command the ground back of the garita San Cosme. I got an officer of the voltigeurs [skirmish unit] with a mountain howitzer and men to work it to go with me. The road being in possession of the enemy, we had to take the field to the south to reach the church. This took us over several ditches breast deep in water and grown up with water plants. These ditches however, were not over eight or ten feet in width. The howitzer was taken to pieces and carried by the men to its destination. When I knocked for admission a priest came to the door who, while extremely polite, declined to admit us. With the little Spanish then at my command, I explained to him that he might save property by opening the door and he certainly would save himself from becoming a prisoner, for a time at least. And besides, I intended to go in whether he consented or not. He began to see his duty in the same light that I did and opened the door, though he did not look as if it gave him special pleasure to do so. The gun was carried to the belfry and put together. We were not more than two or three hundred yards from San Cosme. The shots from our little gun dropped in upon the enemy and created great confusion. Why they did not send out a small party and capture us, I do not know. We had no infantry or other defenses besides our one gun.
The effect of this gun upon the troops about the gate of the city was so marked that General Worth saw it from his position. He was so pleased that he sent a staff officer, Lieutenant Pemberton, to bring me to him. He expressed his gratification at the services the howitzer in the church steeple was doing, saying that every shot was effective and ordered a captain of voltigeurs to report to me with another howitzer to be placed along with the one already rendering so much service. I could not tell the General that there was not room enough in the steeple for another gun, because he probably would have looked upon such a statement as a contradiction from a second lieutenant. I took the captain with me but did not use his gun.
Source: Ulysses S. Grant, Personal Memoirs (1885), l, 152-159. https://archive.org/details/americanhistoryt00ivunse/page/26/mode/2up