A few months later Texas broke away from the mother-country, and her former lords felt sure that from beginning to end, in the colonization, rebellion and successful defence of that region, the hand of the American government could plainly enough be seen. Their state of feeling seemed to Butler "a perfect tempest of passion," and Ellis believed that the Cabinet of Mexico discussed seriously the question of an open rupture with the United States. The Mexican view, however, although supported by a section of the American public, was radically incorrect. Essentially the migration of our citizens across the Sabine formed a part of the great movement that peopled the Mississippi valley. The causes of the Texan rebellion were provided by Mexico herself. That step actually crossed the wish and aims of our administration, which desired to buy the province--not see it become an independent country. From the very first, our national authorities proclaimed and endeavored to enforce neutrality; and they gave the Texans no assistance in their struggle for independence. The British minister at Mexico expressed the opinion to Santa Anna that our government had done all that could be expected, and all that lay in its power; and Santa Anna did not venture to deny this. Individual Americans and sometimes Americans in groups did, it is true, contribute materially to aid the cause of Texas; but in most cases their action was entirely lawful, while in the others it could not be prevented. Moreover, these few trespasses against the law of neutrality were in substance only just retribution for the tyranny, misgovernment and atrocities of Mexico. In reality, therefore, our skirts were as clear as reasonably could have been expected.[3.11] One phase of the case, however, which excited special indignation at Mexico, requires notice. Two streams from the north send their waters into Sabine Lake, and it was held by some that either of these could be regarded as the Sabine River and, therefore, as marking the boundary. In October, 1833, Butler urged that we insist upon the western stream, commonly called the Neches, and occupy in force the valuable intermediate region, which included Nacogdoches; and for a time Jackson felt inclined to do so. Near the close of 1835 Mexico was officially warned against encroaching upon our territory while fighting the Texans, and suspected that Secretary of State Forsyth took this action with a view to the Nacogdoches district. She therefore became alarmed, and early in 1836 a special minister hastily set out for Washington to investigate the matter. This minister was Manuel E. de Gorostiza, a witty, agreeable man of the world, Mexican by birth, Spanish by education, the author of some clever dramas, but not professionally a topographer, a lawyer or even a diplomat.[3.12] [BOUNDARY DIFFICULTIES]