It condemned the seizure of the Black Warrior and warned that America should not permit the establishment of another "Africanized" Santo Domingo.  
It was signed in Aix-la-Chapelle ten days after a conference began in another city.  It was addressed to a former leader of the Albany Regency who had signed the first reciprocity treaty entered into by the United States.  One of the men who signed it was a longtime rival of John Slidell, while another had served as Tyler's secretary of the navy and as Polk's attorney general.  It claims that the actions it describes could lead to the extension of railroads to Cadiz, Malaga, and northern Portugal.  However, it was blasted in the Republican Party platform as a "highwayman's plea that 'might makes right.'"  It condemned the seizure of the Black Warrior and warned that America should not permit the establishment of another "Africanized" Santo Domingo.  Its repudiation by William Marcy brought about the resignation of one of its writers, Pierre Soul?  FTP, name the 1854 document that called on the U.S. to invade Cuba if Spain refused to sell it, which is named for the city in Belgium where it was written.
It was signed in Aix-la-Chapelle ten days after a conference began in another city.  
the Ostend Manifesto