Observe how one false step in policy by nations, like one deviation from virtue in private life, leads by natural consequences to a repetition of errors and crimes, till irreparable ruin ensues. The agricultural interest at home was first attacked; and by the cry of cheap bread, and the weight of class legislation, its protection was taken away. The West India islands were the next victims; because, if the farmer in England raises his wheat with nothing but a nominal protection, it was plausible to say the West India planter must raise his sugar on the same terms. The ruinous competition to which this exposed the West India planters naturally produced in them a desire to be liberated from any burdens to which they were subjected for the benefit of the mother country; and in this demand the Canadians, exposed to the competition of American grain, for a similar reason concurred. Thus the cry for cheap freights, originating in free-trade principles in England, came to be responded to from the British colonies on the other side of the Atlantic; and the Navigation Laws began to be repudiated by the colonies--the very thing which formerly it was their most anxious desire to uphold. The firm though unseen bond of mutual interest, founded on protective principles, which has hitherto held together the vast and widely separated dominions of the British empire, is dissolved. Being deprived of the benefit of protection, they very naturally wished to be relieved of its burdens. Such is the maze of error and danger into which we have been led by the sophistry of free trade; and such the way in which the greatest and best consolidated empires are first loosened, and then destroyed, by the delusions of those entrusted with their guidance. The manner in which foreign shipping has encroached upon British, since the reciprocity system began in 1823, is clearly proved by the centesimal proportions of each, published by Mr Porter, from 1820 to 1844, both inclusive. It will be seen from the following table, that, since 1820, the centesimal proportion of British shipping employed in conducting our trade has _declined_ from 78 to 72, while that of foreign nations has _increased_ from 21 to 27. But this proportion, such as it is, is solely upheld by our colonial trade, which, as already shown, employs nearly 2,000,000 tons of our shipping. But for it, the encroachment of foreign on British shipping would appear in such alarming colours as to strike the most inconsiderate. It is the rapid growth of our colonial trade under the protective system which has alone concealed the ravages effected on it by free trade under the reciprocity. Centesimal Proportions of the British and Foreign Tonnage employed in the Import Trade of the United Kingdom from 1820 to 1844.