vi Preface the dexterity of Onis in concealing the nature of his instructions, the United States was led to relinquish a claim to Texas based on the French title. His Catholic Majesty gave up a strong claim to the Oregon territory, and the acquisition of that claim by the United States added appreciably to those the latter country al- ready had by discovery and settlement Aside from the bartering of these conflicting territorial interests, an agreement was made concerning financial obligations. There was no pecuniary purchase of territory. The aggressiveness of popular opinion in this country was some- what offset by the fine sense of legal rights and international amenities displayed by Secretary of State John Quincy Adams. Nevertheless Adams had unbounded confidence in the future growth of the nation and devoted himself to it. In defining and extending the nation's boundaries in this treaty he gained a diplo- matic victory which he regarded as the greatest achievement of his career. In its accomplishment he deftly availed himself of Spain's embarrassments and of the desire of the European Powers to maintain peace. Onis, with the aid of only one constructive statesman among the officials of his own government, and with the fires of revolution consuming the empire more rapidly than his superiors in Spain realized, acquitted himself ably. He prevented the United States from taking Texas, established a definite boundary for the colonies which Spain still dreamed of saving, and freed his country from financial obligations which would have plagued her long after- ward and in far greater amount. This he accomplished cleverly, but I do not believe, as Adams charged, that Onis himself intended to defraud the United States in the notorious matter of the Florida land grants, although King Ferdinand was probably culpable. I have designated the agreement as the "Adams-Onis Treaty" to give credit to the diplomatists who achieved a solution to com- plex problems of many years' standing. At other times I have em- ployed the phrase "Transcontinental Treaty" (originated by Dr. Samuel Flagg Bemis) to give alliterative emphasis to the broad scope of the subject. The necessity of recognizing the true signifi- cance of the western boundary issues has led to the rejection of such a limited term as the "Florida Treaty." Many persons have assisted me in this study, but space allows