"The Southern Confederacy will not employ our ships or buy our goods. What is our shipping without it? Literally nothing. The transportation of cotton and its fabrics employs more than all other trade. It is very clear the South gains by this process and we lose. No, we must not let the South go." The Manchester, New Hampshire Union Democrat Feb 19 1861
That either revenue from these duties must be collected in the ports of the rebel states, or the ports must be closed to importations from abroad. If neither of these things be done, our revenue laws are substantially repealed, the sources which supply our treasury will be dried up. We shall have no money to carry on the government, the nation will become bankrupt before the next crop of corn is ripe....allow railroad iron to be entered at Savannah with the low duty of ten percent which is all that the Southern Confederacy think of laying on imported goods, and not an ounce more would be imported at New York. The Railways would be supplied from the southern ports.",/b> New York Evening Post March 12, 1861 article "What Shall be Done for a Revenue?"
"But what am I to do in the meantime with those men at Montgomery [meaning the Confederate constitutional convention]? Am I to let them go on... [a]nd open Charleston, etc., as ports of entry, with their ten-percent tariff. What, then, would become of my tariff?" ~ Lincoln to Colonel John B. Baldwin, deputized by the Virginian Commissioners to determine whether Lincoln would use force, April 4, 1861.
On the very eve of war, March 18, 1861, the Boston Transcript wrote: "If the Southern Confederation is allowed to carry out a policy by which only a nominal duty is laid upon the imports, no doubt the business of the chief Northern cities will be seriously injured thereby. The difference is so great between the tariff of the Union and that of the Confederated States, that the entire Northwest must find it to their advantage to purchase their imported goods at New Orleans rather than New York. In addition to this, the manufacturing interest of the country will suffer from the increased importations resulting from low duties….The…[government] would be false to all its obligations, if this state of things were not provided against."
[demanding a blockade of Southern ports, because, if not] "a series of customs houses will be required on the vast inland border from the Atlantic to West Texas. Worse still, with no protective tariff, European goods will under-price Northern goods in Southern markets. Cotton for Northern mills will be charged an export tax. This will cripple the clothing industries and make British mills prosper. Finally, the great inland waterways, the Mississippi, the Missouri, and the Ohio Rivers, will be subject to Southern tolls." The Philadelphia Press 18 March 1861
December 1860, before any secession, the Chicago Daily Times foretold the disaster that Southern free ports would bring to Northern commerce: "In one single blow our foreign commerce must be reduced to less than one-half what it now is. Our coastwide trade would pass into other hands. One-half of our shipping would lie idle at our wharves. We should lose our trade with the South, with all of its immense profits. Our manufactories would be in utter ruins. Let the South adopt the free-trade system, or that of a tariff for revenue, and these results would likely follow." Chicago Daily Times Dec 1860
"The South has furnished near three-fourths of the entire exports of the country. Last year she furnished seventy-two percent of the whole...we have a tariff that protects our manufacturers from thirty to fifty percent, and enables us to consume large quantities of Southern cotton, and to compete in our whole home market with the skilled labor of Europe. This operates to compel the South to pay an indirect bounty to our skilled labor, of millions annually." - Daily Chicago Times, December 10, 1860
[the North relied on money from tariffs] “so even if the Southern states be allowed to depart in peace, the first question will be revenue. Now if the South have free trade, how can you collect revenues in eastern cities? Freight from New Orleans, to St. Louis, Chicago, Louisville, Cincinnati and even Pittsburgh, would be about the same as by rail from New York and imported at New Orleans having no duties to pay, would undersell the East if they had to pay duties. Therefore if the South make good their confederation and their plan, The Northern Confederacy must do likewise or blockade. Then comes the question of foreign nations. So look on it in any view, I see no result but war and consequent change in the form of government." William Tecumseh Sherman in a letter to his brother Senator John Sherman 1861.
On 18 March 1861, the Boston Transcript noted that while the Southern states had claimed to secede over the slavery issue, now "the mask has been thrown off and it is apparent that the people of the principal seceding states are now for commercial independence. They dream that the centres of traffic can be changed from Northern to Southern ports....by a revenue system verging on free trade...."
"For the contest on the part of the North is now undisguisedly for empire. The question of slavery is thrown to the winds. There is hardly any concession in its favor that the South could ask which the North would refuse provided only that the seceding states re-enter the Union.....Away with the pretence on the North to dignify its cause with the name of freedom to the slave!" London Quarterly Review 1862
“[T]he contest is really for empire on the side of the North, and for independence on that of the South, and in this respect we recognize an exact analogy between the North and the Government of George III, and the South and the Thirteen Revolted Provinces. These opinions…are the general opinions of the English nation.” London Times, November 7, 1861
"If it be not slavery, where lies the partition of the interests that has led at last to actual separation of the Southern from the Northern States? …Every year, for some years back, this or that Southern state had declared that it would submit to this extortion only while it had not the strength for resistance. With the election of Lincoln and an exclusive Northern party taking over the federal government, the time for withdrawal had arrived … The conflict is between semi-independent communities [in which] every feeling and interest [in the South] calls for political partition, and every pocket interest [in the North] calls for union. So the case stands, and under all the passion of the parties and the cries of battle lie the two chief moving causes of the struggle. Union means so many millions a year lost to the South; secession means the loss of the same millions to the North. The love of money is the root of this as of many other evils … the quarrel between North and South is, as it stands, solely a fiscal quarrel." – Charles Dickens, as editor of All the Year Round, a British periodical in 1862
"The Northern onslaught upon slavery was no more than a piece of specious humbug designed to conceal its desire for economic control of the Southern states." --Charles Dickens, 1862
Thank you. You have a better ready reference than I do. :)