The prompt result of Mr. Calhoun's efforts was a treaty of annexation which had been discussed but not concluded under Mr. Upshur. It was communicated to the Senate by the President on the 12th of April, 1844. The effect which this treaty produced on the political fortunes of two leading statesmen, one in each party, was extraordinary. Prior to its negotiation, the Democrats throughout the Union were apparently well united in support of Mr. Van Buren as their Presidential candidate. Mr. Clay was universally accepted by the Whigs,--his nomination by a national convention being indeed but a matter of form. Relations of personal courtesy and confidence, if not of intimate friendship, had always subsisted between Mr. Clay and Mr. Van Buren during their prolonged public service. It was now believed that they had come to an understanding, through the negotiation of friends, to eliminate the Texas question from the campaign of 1844 by defeating the Tyler-Calhoun treaty, and agreeing to a general postponement of the subject, on the ground that immediate annexation would plunge the country into war. Very soon after the treaty was sent to the Senate by the President, Mr. Clay published in the "National Intelligencer" his famous Raleigh letter against annexation. The "Globe" of the same day contained a more guarded communication from Mr. Van Buren, practically taking the same ground. Considering the widely different characteristics of the two men, the letters were singularly alike in argument and inference. This fact, in connection with the identical time of publication, strengthened the suspicion, if not the conclusion, that there was a pre-arranged understanding between the eminent authors.