We have been requested to give such aid as may be in our power to facilitate the objects of the Anti-tax-on-Knowledge Association, having, as is pretty correctly inferred, no small interest in seeing at least one department of the exaction--the duty on paper--swept away. So frequently, however, have we petitioned parliament on this subject, and with so little practical avail, that we have made up our minds to petition no more. If the public desire to get cheap newspapers, cheap literary journals, and cheap advertisements, they must say so, and take on themselves the trouble of agitating accordingly. This they have never yet done. They seem to have imagined that the question is one exclusively between publishers and papermakers and the government; whereas, in point of fact, it is as much a public question as that of the late taxes on food, and should be dealt with on the same broad considerations. We are, indeed, not quite sure that publishers, papermakers, and other tradesmen intimately concerned in the question are, _as a body_, favourable to the removal of the stamp, the Excise, and other taxes on their wares. Generally speaking, only a few of the more enterprising, and the least disposed to maintain a monopoly, have ever petitioned for the abolition of these taxes. This will seem curious, yet it can be accounted for. A papermaker, to pay the duty on the goods he manufactures, must have a large command of capital; comparatively few can muster this capital; hence few can enter the trade. London wholesale stationers, who, by advancing capital to the papermakers, acquire a species of thraldom over them, are, according to all accounts, by no means desirous to see the duties abolished; for if they were abolished, their money-lending and thirlage powers would be gone. So is it with the great monopolists of the newspaper press. As things stand, few can compete with them. But remove the existing imposts, and let anybody print a newspaper who likes, and hundreds of competitors in town and country would enter the field. There can be no doubt whatever that the stamp and advertisement-duty, particularly the latter, would long since have been removed but for the want of zeal shown by the London newspaper press. If these, however, be mistaken opinions, let us now see the metropolitan stationers and newspaper proprietors petition vigorously for the removal of the taxes that have been named.