I ask your attention to the message of my predecessor at the opening of the second session of the Nineteenth Congress, relative to our commercial intercourse with Holland, and to the documents connected with that subject, communicated to the House of Representatives on the 10th of January, 1825, and 18th of January, 1827. Coinciding in the opinion of my predecessor that Holland is not, under the regulations of her present system, entitled to have her vessels and their cargoes received into the United States on the footing of American vessels and cargoes as regards duties of tonnage and impost, a respect for his reference of it to the Legislature has alone prevented me from acting on the subject. I should still have waited without comment for the action of Congress, but recently a claim has been made by Belgian subjects to admission into our ports for their ships and cargoes on the same footing as American, with the allegation we could not dispute that our vessels received in their ports the identical treatment shewn to them in the ports of Holland, upon whose vessels no discrimination is made in the ports of the United States. Giving the same privileges the Belgians expected the same benefits---benefits that were, in fact, enjoyed when Belgium and Holland were united under one Government. Satisfied with the justice of their pretension to be placed on the same footing with Holland, I could not, nevertheless, without disregard to the principle of our laws, admit their claim to be treated as Americans, and at the same time a respect for Congress, to whom the subject had long since been referred, has prevented me from producing a just equality by taking from the vessels of Holland privileges conditionally granted by acts of Congress, although the condition upon which the grant was made has, in my judgment, failed since 1822. I recommend, therefore, a review of the act of 1824, and such a modification of it as will produce an equality on such terms as Congress shall think best comports with our settled policy and the obligations of justice to two friendly powers. With the Sublime Porte and all the Governments on the coast of Barbary our relations continue to be friendly. The proper steps have been taken to renew our treaty with Morocco. The Argentine Republic has again promised to send within the current year a minister to the United States.