The Confederate purchases of arms and munitions in England were based on the CSA export of cotton, and loans from banks in England, with the money never leaving England, but paid directly to British suppliers from the banks.
"Never before was a government at war supplied with arms, munitions, clothing, and medicines, with so little money as was paid by the Confederacy"- CSA Major Caleb Huse, CSA Agent in Europe
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It was not a common practice for the Confederate government to ship their treasuries gold reserves out of country, and for Confederate gold to be shipped across the Everglades is very questionable.