We beg it will be distinctly understood, that, in estimating the remunerative prices of foreign grain, we do not profess to arrive at more than general conclusions. It matters nothing for or against our argument whether wheat can be delivered at Dantzic a little cheaper, or a little dearer, than the above sum. We leave room on either side for a considerable margin. This much, however, we know for a fact, that an eminent corn-merchant in Leith has, in former years, purchased fine wheat, free on board, at Dantzic for 18s., with the offer of a constant supply, and that no circumstances have since then emerged to enhance the cost of production. Besides this, as Mr Sandars well remarks in one of his published letters, we have had plain and evident experience of foreign production under the working of the corn law of 1842. We had a fixed duty of 20s. per quarter in actual operation for four years; and in 1844 and 1845, such duty was paid, week after week, and in the latter year for six months consecutively, at a time when our general averages were only 46s. to 47s. a quarter. Was the foreigner at that time selling at a loss? His price, then, adapting itself to ours, was 26s. and 27s., deducting the duty, and at that time, be it remembered, _he was unprepared for competition_. So that, from experience not five years old, we may gather what kind of future competition awaits us, and also what we are annually sacrificing in revenue, by madly abandoning protection. Does any one believe that, in 1845, had there been no duty on foreign corn, wheat would have fallen to 26s., or the foreigner have sold his crop at that price? The remitted duty goes into the pocket of the foreigner, who is selling in the dearest market, and underselling our farmers, as he will be able to do--for he has tested that ability already--down to a point which must extinguish British agriculture. We know also from Mr Meek's report, quoted by Sir Robert Peel in 1842, that "the prices of corn in Denmark have, during the last twenty-five years, averaged, for wheat, 28s. 10d., rye, 19s. 9d., barley, 14s., and oats, 10s. 6d. per quarter," and it is obviously ridiculous to suppose that the cost of production in Poland is nearly so high as in Denmark and Schleswig-Holstein. Last year Denmark sent us upwards of a million quarters of grain. These are facts which have distinctly emerged, and they are all-important at the present time, when the tenantry are urged to expend further capital on the chance of future rise of prices. It is now perfectly clear that the returns, which were assumed as the basis for the great experiment, are worthy of no confidence. On the other hand, we do not wish that our opinions, which point to a totally different result, should influence any one in his future line of conduct; but, beyond our opinions, there are certain facts, which we have just stated, and the import of which cannot be misunderstood, and these may serve as warnings for the future.