There is no doubt that although the government of the United States was anxious to preserve a strict neutrality between the belligerents in 1837, and, thus, to avoid assuming the war with Mexico by annexing an insurgent State, it, nevertheless, refused the proffered union with regret. From the earliest period, our statesmen contended that, by the Louisiana treaty, we acquired a title to Texas extending to the Rio Grande, and that we unwisely relinquished our title to Spain by the treaty of 1819 which substituted the Sabine for the Rio Grande as our western boundary.[39] But, divested as we were by solemn compact with Spain, of what may have been our territory under the treaty with France, it was idle to regard Texas as a proper subject for restoration to the Union whilst active hostilities were waged by Mexico. Nevertheless, such was the evident value of the province, and such the anxiety to regain our ancient limits that before the outbreak of the revolution, Mr. Clay, as secretary of state under the administration of Mr. Adams, in March of the years 1825 and 1827, directed Mr. Poinsett, our envoy in Mexico, to negotiate for the transfer of Texas. This direction was repeated by Mr. Van Buren to our minister in August, 1829; and was followed by similar instructions from Mr. Livingston on the 20th of March, 1833, and by Mr. Forsyth on the 2d of July, 1835. President Jackson, however, was not contented with negotiations for that province alone; but, looking forward, with statesmanlike forecast, to the growth and value of our commerce in the Pacific ocean as well as on the west coast of America, he required the secretary of state, in August, 1835, to seek from Mexico a cession of territory, whose boundary, beginning at the mouth of the Rio Grande, would run along the eastern bank of that river to the thirty-seventh degree of latitude, and continue thence, by that parallel, to the Pacific. This demand, if granted by Mexico, not only secured Texas, but would have included the largest and most valuable portion of California together with the noble bay of San Francisco, in which our navy and merchantmen might find a safe and commodious refuge.[40] Our anxiety to reannex Texas by peaceable negotiation was not met, however, by a correspondent feeling upon the part of Mexico. Mr. Poinsett, on his return from Mexico, informed Mr. Clay that he had forborne even to make an overture for the repurchase of Texas, because he knew that such a negotiation would be impracticable, and believed that any hint of our desire would aggravate the irritations already existing between the countries.[41] The events which subsequently transpired in Texas, during the period when emigration increased from the United States, to that of the actual outbreak of hostilities, prevented the formation, in Mexico, of any party favorable to such an enterprise; and, after the war began, all hope of negotiation between us was dispelled.