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know the source of it (ibid., 298). Pillow reported, apparently during the evening of September 7, that the cannon and machinery had been removed (ibid., 298, 579); no smoke appeared to issue from the mill; no sound of boring could be heard (Semmes, Service, 431). It has been suggested that Scott felt over-eager to punish Santa Anna for disappointing his expectations of peace; but he doubtless had learned from Trist of Santa Anna's political difficulties. He was, however, angry on account of the violations of the armistice. The principal information: on which Scott acted was understood to have come through Trist; it had been correct; but Scott seems to have erred in overlooking the chance that conditions might change in two or three days. Rives (U. S. and Mexico, ii, 528) states that the attack was based on a "rumor." This is an error. On account of the apparent incorrectness of Scott's information and the massing of Mexican troops in and near El Molino, some Americans suspected that Santa Anna set a trap for him. But the fact that Santa Anna left this quarter and took away a considerable part of his troops early in the night of Sept. 7 — leaving behind, according to Roa Bárcena (Recuerdos, 427) 4000 infantry and artillery privates — disposes of that idea. It has been said that Scott might have stopped work at the foundry (had work been then proceeding) by cutting off the supply of water (i.e., power); but he wished to seize the finished cannon supposed to be there (Sen. 65; 30, 1, p. 298) and the large quantity of powder that he had heard was at Casa Mata.

The only argument advanced in favor of a night attack seems to have been the danger of fire from Chapultepec. In reply it was said that (as had been seen at Cerro Gordo) a plunging fire did little harm. The distance of Chapultepec seems almost to nullify this reply; but as a matter of fact the cannon of Chapultepec appear to have done no execution in the battle. Worth's officers met him after dark, Sept. 7, and later one of them submitted his general plan of operations to Scott, who discussed it at considerable length and finally (virtually admitting that a night attack was not advisable) approved all of it except the following point. Worth strongly desired to effect a lodgement in the grove of Chapultepec, which he believed he could take at a cost of fifty men (364Worth to S., Dec. 27). (Indeed, he pushed some of his troops several hundred yards that way: Sen. 1; 30, 1, app., 188; Davis, Autobiog., 271). But Scott refused positively to have this done. Semmes (Service, 447) says that Worth desired to capture Chapultepec at this time because with his remarkable intuitive judgment he saw, as Scott saw later, that this was the true approach to the city; but Scott's later opinion was due to a study of the ground which neither he nor Worth had at this time been able to make and to Mexican fortifying not yet done. Even if Worth could have carried Chapultepec rather easily, the prudent maxim that one should not buy (because it can be got cheaply) what one does not want, appeared to apply with especial force after losses that could be so ill afforded had been suffered; and it was not certain that the castle could be taken without a struggle. One costly surprise was enough for one day. Engineer Stevens (Stevens, Stevens, i, 206) thought an attempt should have been made to reconnoitre the Mexican right with a view to turning the position; but to push a reconnoitring party between the Mexican right wing and the cavalry of Alvarez must have looked extremely hazardous.

Clarke's brigade consisted of the Fifth Sixth and Eighth Infantry, it will be recalled. Cadwalader had the Voltigeurs and Eleventh and