MESSAGE FROM THE PRESIDENT OF THE UNITED STATES, ACCOMPANYING A REPORT OF THE SECRETARY OF STATE, WITH A LETTER TO HIM, FROM MATTHEW CLARKSON, ESQ. AND A LIST OF THE CLAIMS ADJUSTED BY THE COMMISSIONERS UNDER THE 21ST ARTICLE OF OUR TREATY WITH SPAIN. 23D JANUARY, 1800. ORDERED TO LIE ON THE TABLE. [PUBLISHED BY ORDER OF THE HOUSE OF REPRESENTATIVES.].