In my official report it is further stated that: "The troops had become engaged in our front within ten minutes after a reconnaissance had been ordered by General Twiggs, and before the officer whom I was escorting had been able to make a single observation".
In my official copy of that report, I find the following sentence, which is not in the printed report:
"Deeply do I regret that the attack, in advance of the reconnoitring party, precipitated the attack on our side, and involved us in action against we knew not what".
The force which became engaged, far to our right--before the reconnaissance, supported by the engineer company, fairly commenced, was the advance of Worth's division pursuing the Mexicans who had abandoned their strong works at San Antonio.
Captain James L. Mason, engineer of Worth's division, says, in his official report, that the works attacked by that division, and "so gallantly stormed, had not been reconnoitred".
The engineers in front of the convent, being informed that the rifles with Captain Lee had gone to our right considerably farther from the battery, advised that the rifles be supported by an additional regiment. The same engineers advised that one gun be sent to the front to drive the Mexicans from the roof of the convent, and thus relieve our troops on the right from a destructive plunging fire.
The additional escort of two companies, asked for by the reconnoitring engineers, had not come to the front. After Lieutenant Stevens had gone back to General Twiggs, to have one gun with a few rounds of proper ammunition sent forward for the purpose of clearing the roof of the convent, the firing in our front, on the San Antonio road, had materially increased; and the fire from the convent, upon the engineer company, was becoming troublesome. There had been, to me, unexpected delay in bringing the one gun forward; and I determined, as already stated, to place the men under the best shelter at hand, and endeavor to make, in person, a closer examination of the works.
Resuming quotations from my official report--it is therein stated:
"At this time the First Artillery came up to where I was. The lamented and gallant Burke, at the head of the leading company, asked which direction they were to take. I inquired what were his orders. He said that the regiment was ordered to support the Rifles. I pointed to the smoke, which was all we could see by which to determine the position of our troops engaged in a corn-field on our right; told him that they reached their present place by moving farther to the rear, out of range of the works; and remarked to him that the fire through which he would have to pass in the direction he was going was very severe. He replied that they were ordered to move by that road to support the Rifles. The First Artillery filed by and soon encountered, at a distance of 150 yards from the enemy, the heaviest fire of artillery and musketry, followed almost immediately after [by that] brought to bear upon Taylor's battery, which had been ordered to fire upon the convent; and, in selecting a place suitable for managing the guns, had most unfortunately been placed, entirely exposed, directly in front of a well constructed battery with heavy pieces firing in embrasure."