The immediate cause of the alarm which led to the examination of this subject by the Hon. Edmund Burke, and others, of the British Parliament, was the adoption, by the North American colonies, of the policy of non-importation and non-consumption of all English products, whether from the mother country, or any of her colonies; and the non-exportation of any North American products to Great Britain, the West Indies, or any of the dependencies of the crown. This agreement was adopted as a measure of retaliation upon Parliament, for the passage of the Boston Port Bill, which ordered the closing of Boston harbor to all commerce. The measure was first proposed at a meeting of the citizens of Boston, held on May 13, 1774. It was soon seconded by all the principal cities, towns, and counties, throughout the colonies; and when the Continental Congress met at Philadelphia, the terms of the league were drawn up and adopted, October 20, 1774, and went into operation. A few extracts from memorials to Parliament, praying that the difficulties with North America might be adjusted, and the threatened evils averted, will show how the slave trade was then interwoven with the commerce and national prosperity of Great Britain, and to what extent the American league could affect that prosperity. In the House of Commons, January 23, 1775: "Mr. Burke then presented a petition of the Master, Wardens, and Commonalty, of the Society of Merchants Venturers of the city of Bristol, under their common seal; which was read, setting forth, That a very beneficial and increasing trade to the British colonies in America, has been carried on from the port of Bristol, highly to the advantage of the kingdom in general, and of the said city in particular; and that the exports from the said port to America, consist of almost every species of British manufactures, besides East India goods, and other articles of commerce; and the returns are made not only in many valuable and useful commodities from thence, but also, by a circuitous trade, carried on with Ireland, and most parts of Europe, to the great emolument of the merchant, and improvement of his Majesty's revenue; and that the merchants of the said port are also deeply engaged in the trade to the West India islands, which, by the exchange of their produce with America, for provisions, lumber, and other stores, are thereby almost wholly maintained, and consequently, become dependent upon North America for support; and that the trade to Africa, which is carried on from the said port to a very considerable extent, is also dependent upon the flourishing state of the West India islands, and America; and that these different branches of commerce give employment not only to a very numerous body of artists and manufacturers, but also to a great number of ships, and many thousand seamen, by which means a very capital increase is made to the naval strength of Great Britain. . . . . . The passing certain acts of