Here it is again, since you have now missed it twice:
"Importers pass on [most of] their costs to buyers, and industrial buyers pass those costs on in the form of higher prices. . . . Consumers, hit directly or indirectly, include the inflationary price increases in their wage and salary demands. Everybody tries to pass the tax to someone else. The only group that is powerless to pass the costs on further are the exporters, who have to sell at world prices, and swallow those costs. In essence, a tax on imports becomes a tax on exports."
Lot of wage and salary demands in the mid-nineteenth century were there? Employers set the rates at what they wanted to pay, and if someone didn't want to work for that rate then they found someone who would. And since the majority of people, North and south, East and West, earned their livings as farmers then they were under the same constraints as the southern exporter, weren't they? They sold their goods at what the market would pay for it. So a tax on imports became a tax on anyone who was at the mercy of what the market would pay, which meant it hit virtually all consumers in all parts of the country equally. Or did Tommy forget about that?