ON BOARD THE “CRUZEIRO DO SUL.”—MEMBERS OF THE PARTY.—ARRIVAL AT BAHIA.—DAY IN THE COUNTRY.—RETURN TO THE STEAMER.—CONVERSATION ABOUT SLAVERY IN BRAZIL.—NEGRO MARRIAGES.—MACEIO.—PERNAMBUCO.—PARAHYBA DO NORTE.—RAMBLE ON SHORE.—CEARÁ.—DIFFICULT LANDING.—BRAZILIAN BATHS.—MARANHAM.—ASSAI PALM.—VISIT TO ORPHAN ASYLUM.—DETAINED IN PORT.—VARIETY OF MEDUSÆ.—ARRIVAL OF AMERICAN GUNBOAT.—MORE MEDUSÆ.—DINNER ON SHORE.—CORDIALITY TOWARD THE EXPEDITION.—ARRIVAL AT PARÁ.—KIND RECEPTION.—ENVIRONS OF PARÁ.—LUXURIANT GROWTH.—MARKETS.—INDIAN BOATS.—AGREEABLE CLIMATE.—EXCURSION IN THE HARBOR.—CURIOUS MUSHROOM.—SUCCESS IN COLLECTING, WITH THE ASSISTANCE OF OUR HOST AND OTHER FRIENDS.—FISHES OF THE FORESTS.—PUBLIC EXPRESSIONS OF SYMPATHY FOR THE EXPEDITION.—GENEROSITY OF THE AMAZONIAN STEAMSHIP COMPANY.—GEOLOGICAL CHARACTER OF THE SHORE FROM RIO TO PARÁ.—ERRATIC DRIFT.—LETTER TO THE EMPEROR. _July 25th._—On board the “Cruzeiro do Sul.” We sailed to-day at 11 o’clock, bidding good by with regret, though not without hope of return, to the beautiful bay and mountains on which we have been looking for three months. Our party consists of Major Coutinho, Mr. Burkhardt, Monsieur Bourget, who accompanies Mr. Agassiz to the Amazons as collector and preparator, our two young friends Mr. Hunnewell and Mr. James, and ourselves. At Bahia we shall be joined by Mr. Dexter and Mr. Thayer, two of our party who have preceded us up the coast, and have been collecting in the neighborhood of Bahia for two or three weeks. The aspect of the steamer is not very inviting, for it has been used of late for the transportation of troops to the south, in consequence of which it is very dirty; it is also overcrowded on account of the number of persons bound northward, who have been detained in Rio by the interruption of the regular trips on this line. We are promised better accommodations after a few days, however, as many of the passengers will drop off at Bahia and Pernambuco.