Besides, the aim of the United States was peace; it appeared certain that in view of the battle just won the Mexicans would be disposed to offer acceptable terms; and resident Americans as well as neutrals had assured Scott that by taking the city, breaking up the government, dispersing the sensible and substantial men who desired a settlement, and perhaps rousing the people to desperation, he would be defeating his own government. On the other hand, as the General had reckoned before leaving Puebla, the presence of a victorious American army waiting at the gate seemed likely to excite intense fears of slaughter and sack, and prove a most effective argument for negotiation. Consequently, though sure he could break his way in, Scott deliberately sacrificed military glory, and halted. The wish to end hostilities was the dominant consideration; and, fully to understand this, we must now place ourselves at Washington, and then return to our present point by a singularly winding route.[27.1] Both in his war Message of May 11, 1846, and later, Polk announced that he would be ready to negotiate whenever Mexico would make or even hear propositions; and he sought a listening ear with a persistence due to several causes: a real desire to end the war, a naïve ignorance of Mexican psychology, the exigencies of home politics and foreign relations, a natural predilection on his own part and on Buchanan's for schemes and tactics, and behind all a sincere wish, in accordance with our long-standing sentiment and policy, for the prosperity and friendship of the sister republic. Taylor was therefore instructed to place himself on confidential terms, if possible, at the Mexican headquarters with a view to bringing about negotiations; and in line with this policy Worth, while at Saltillo, offered pleasant sentiments to Santa Anna on the subject of peace.[27.2] The battles on the Rio Grande and the unwelcome effects of the blockade tended to sober Mexico, as did the aloofness of Great Britain; and Marcy counted not a little on the settlement of the Oregon question. Intimations were received from Consul Black in June and July, 1846, that not only all thoughtful citizens but Paredes himself desired to reach an agreement. Bravo and his Cabinet, who temporarily assumed the reins of government, felt more strongly in the same way, and were more free to act; other signs also pointed in that direction; and it was hoped that Santa Anna, should he regain power, would favor peace. The American administration, on the other hand, felt much embarrassed by the unexpected seriousness of the problems involved in the conflict. So on the twenty-seventh of July Buchanan addressed the Mexican minister of relations, waiving as undesirable all discussion upon the causes of the war, and inviting negotiations in the most conciliatory manner.[27.4]