_April 28th._—This morning we went over to the Colorado, which still lies in the harbor, and where the visit of the Emperor was expected. We all felt an interest in the occasion, for we have a kind of personal pride in the fine ship whose first voyage has been the source of so much enjoyment to us. The Imperial yacht arrived punctually at twelve o’clock, and was received by the captain with a full salute from his Parrott guns, fired with a promptness and accuracy which the Emperor did not fail to notice. His Majesty went over the whole steamer; and really an exploring expedition over such a world in little, with its provision-shops, its cattle stalls, its pantries and sculleries, its endless accommodations for passengers and freight, its variety of decks and its great central fires, deep below all, is no contemptible journey for a tropical morning. The arrangements of the vessel seemed to excite the interest and admiration both of the Emperor and his suite. Captain Bradbury invited his Majesty to lunch on board; he very cordially accepted, and remained some time afterward, conversing chiefly about scientific subjects, and especially on matters connected with the expedition. The Emperor is still a young man; but though only forty, he has been the reigning sovereign of Brazil for more than half that time, and he looks careworn and somewhat older than his years. He has a dignified, manly presence, a face rather stern in repose, but animated and genial in conversation; his manner is courteous and friendly to all.