The only European possession in South America at this time was Guiana, fronting on the Atlantic north of Brazil and divided among France, Holland, and Great Britain. Beyond British Guiana, the westernmost division, lay Venezuela. Between the two stretched a vast tract of unoccupied tropical jungle. Somewhere there must have been a boundary, but where, no man could tell. The extreme claim of Great Britain would have given her command of the mouth of the Orinoco, while that of Venezuela would practically have eliminated British Guiana. Efforts to settle this long-standing dispute were unavailing. Venezuela had from time to time suggested arbitration but wished to throw the whole area into court. Great Britain insisted upon reserving a minimum territory and would submit to judicial decision only the land west of what was known as the Schomburgh line of 1840. As early as 1876 Venezuela appealed to the United States, "the most powerful and oldest of the Republics of the new continent," for its "powerful moral support in disputes with European nations." Several times the United States proffered its good offices to Great Britain, but to no effect. The satisfactory settlement of the question grew more difficult as time went on, particularly after the discovery of gold in the disputed region had given a new impulse to occupation. President Cleveland took a serious view of this controversy because it seemed to involve more than a boundary dispute. To his mind it called into question the portion of Monroe's message which, in 1823, stated that "the American continents... are henceforth not to be considered as subjects for future colonization by any European powers." According to this dictum, boundaries existed between all nations and colonies of America; the problem was merely to find these boundaries. If a European power refused to submit such a question to judicial decision, the inference must be made that it was seeking to extend its boundaries. In December, 1894, Cleveland expressed to Congress his hope that an arbitration would be arranged and instructed his Secretary of State to present vigorously to Great Britain the view of the United States.