DANGER AND SAFETY.-- ... The cotton of the United States affords employment to upwards of three millions of people in England, and a famine of cotton would be far worse than a famine of bread; the deficiency of the latter could be supplied; but the destruction of the cotton crop in America would be an evil of unparalleled magnitude, and against which we have no present protection.... From the district of Lagos on the Gold coast, near the kingdom of Dahomey, there comes amongst us Dr. Delany with promises of a deeply interesting exposition of the prospects of Africa, and the probabilities of the civilization and elevation of the black races. He is a _bona fide_ descendant of one of the elite families of Central Africa, a highly educated gentleman, whose presence at the International Statistical Congress was noticed by Lord Brougham, and whose remarks in the sanitary section of the Congress upon epidemics were characterized by a great knowledge of the topic combined with genuine modesty. He is a physician of African blood, educated in America, who has revisited the lands of his ancestry, and proposes a most reasonable and feasible plan to destroy the slave trade, by creating a _cordon_, or fringe of native civilization, through which the kidnappers could not penetrate from without, and through which no slaves could be transported from within. Dr. Delany is one of the Commissioners sent out by the convention of the colored people of Canada and the United States. He has recently returned from the Yoruba country, adjoining the territory of the King of Dahomey, and desires to elicit a favorable consideration for the African Aid Society. His explorations have been productive of the most promising results, his fellow blacks having everywhere received him with distinguished honors. His anecdotes are interesting, and his lectures are illustrated by specimens of native produce and manufactures highly curious. Of his lectures at Brighton and other places we have read lengthy reports, which represent the influence these addresses have produced, and which speak in eulogistic terms of Dr. Delany's matter and manner. The subject is one of vast importance to England, and we trust that we may witness ere long a proper appreciation of it. FROM THE GLASGOW HERALD All this betokens a considerable degree of intelligence. The towns had their market-places; in one of these, that of Ijaye Dr. Delany saw many thousands of persons assembled, and carrying on a busy traffic. What a field might thus, in the course of time, be opened for European commerce. FROM THE LEEDS MERCURY (ENGLAND) _Published by E. Baines, Esq., M.P., and Sons, December 8th, 1860_