In the performance of my duty I found the greatest difficulty in deciding what should be considered as "moral fitness" for the Navy. Physical, mental, and professional fitness may be decided with a considerable degree of accuracy by a naval court of inquiry, but the question of moral fitness is of a very different character. There has been but one perfect standard of morality on earth, and how far a departure from His precepts and example must proceed in order to disqualify an officer for the naval service is a question on which a great difference of honest opinion must always exist. On this question I have differed in several instances from the courts of inquiry. There is one nomination which I regret that I have not the power to present to the Senate, and this is in the case of Commodore Stewart. His name stood on the Register at the head of the list of captains in the Navy until it was removed from this well-earned position by the retiring board and placed on the list of retired officers. The deeply wounded feelings of this veteran officer, who had contributed so much to the efficiency and glory of the Navy from its infancy, prevented him from applying for restoration to his rank and submitting to a court of inquiry composed of his junior officers the question of his "physical, mental, professional, and moral fitness" for the naval service. I would ere this have recommended to Congress the passage of a joint resolution to restore him to his former rank had I not believed this would more appropriately emanate from the legislative branch of Government. I transmit herewith to the Senate the original records in the fifty-eight cases to which I have referred. After they shall have been examined by the Senate I would respectfully request that they might be returned to the Navy Department. JAMES BUCHANAN. WASHINGTON, _December 22, 1858_. _To the Senate of the United States_: I transmit to the Senate, for its consideration with a view to ratification, a convention between the United States and Belgium for regulating the commerce and navigation between the two countries, signed in this city on the 17th of July last. JAMES BUCHANAN. WASHINGTON, _December 23, 1858_. _To the Senate of the United States_: I transmit for the consideration of the Senate a convention with New Granada, signed on the 10th day of September, 1857, and a translation of the decree of the President of that Republic ratifying and confirming the same with certain modifications and explanations. JAMES BUCHANAN. WASHINGTON, _December 27, 1858_. _To the Senate and House of Representatives_: I transmit a copy of a letter of the 8th of April last from the minister of the United States in China, and of the decree and regulation which accompanied it, for such revision thereof as Congress may deem expedient, pursuant to the sixth section of the act approved 11th August, 1848. JAMES BUCHANAN. WASHINGTON, _January_ 4, _1859_. _To the House of Representatives_: