Our treaties have thus been powerless for good; and, what is worse, they have been powerful for bad. The horrors of the middle passage have been immeasurably increased. The more stringent the treaties the more inhuman becomes the trade; and the only result will be aggravated sufferings to the unfortunate victims of our well-meaning philanthropy. The greater the risks the higher the profits; and there will always be desperate men—men who have nothing to lose—who will expose themselves to any dangers to win the gold they love. One successful voyage amply compensates for the sufferings and dangers they endure. Instead of having large roomy vessels, we have compelled the slave dealers to use vessels the most unfit in character, and destitute of the most necessary accommodation. In 1841, the Jesus Maria, of 85 tons size, with 278 slaves, and 19 passengers and crew, made the voyage across the Atlantic. If the reader thinks of a Cowes pilot-boat, with 297 human beings beneath the sun of the tropics, he may form some idea of the sufferings to which the slaves must have been exposed. By our present system we cannot destroy, though we can add, and that in no common degree, to the cruelty of the voyage. The high profits will always attract the man of ruined hopes and character, and such there always are to seize every project—to encounter every risk. On the east coast of Africa negroes are usually paid for in money, or coarse cottons. The men fetch 15 dollars, the boys 12. At Rio Janeiro their value may be estimated at 52_l._ for the men; 41_l._ 10_s._ for women, and 31_l._ for boys. Thus on a cargo of 500, at the mean price, the profits will exceed 19,000_l._ Cost price of 500 at 15 dollars, or 3_l._ 5_s._ £1,625 each Selling price at Rio of 500, at 41_l._ 10_s._ £20,750 Have our readers met with “Fifty Days on Board a Slaver,” by the Rev. Pascoe Grenfell Hill? _That_ shows the value of armed suppression. Mr. Hill has done good service by exposing the horrors of British mercy. Mr. Hill was chaplain on board her Majesty’s ship the Cleopatra, when she captured the Progresso last April twelvemonth, in the Mozambique channel. When she fell in with the Progresso, the slave vessel had been laden but a few hours, and there had been no time to generate disease. However a change soon took place, and we must borrow Mr. Hill’s words:—