The Bank of the United States, on the expiration of its charter in March, 1836, accepted a charter from the State of Pennsylvania; but, though its influence continued to be as great, its direction was no longer the same. Abandoning its legitimate business, it speculated in merchandise, and even kept an agent in New Orleans to compete with the Barings in purchases of the cotton crop as a basis for exchange. Precisely as in 1811, after the withdrawal of the control of the Bank of the United States, the state banks ran a wild career of speculation. From 1830 to 1837 three hundred new banks sprang up with an additional capital of one hundred and forty-five millions, doubling, as twenty years before, the banking capital of the country. This volume the deposits of the Treasury continued to swell. Mr. Woodbury was the first to take alarm. In December, 1836, he reported the specie in the country to have increased from thirty millions in 1833 to seventy-three millions at the date of his report, and the paper circulation, in the same period, to have advanced, since the removal of the deposits from the Bank of the United States, from eighty millions to one hundred and twenty millions, or forty millions in eighteen months; and the bank capital, in the same period, to have increased from two hundred to three hundred millions. Importation augmented; the balance of trade suddenly turned against the United States to the extent of one hundred and fifty millions, and coin began to flow abroad to liquidate the account. There was no debt to attract foreign investment and arrest the export of specie. Added to this was the withdrawal of the government deposits from the pet banks, which compelled an immediate contraction. The result was inevitable. On May 10, 1837, the New York banks suspended, Mr. Gallatin's institution being of course dragged down with the rest. It is idle to suppose that any single bank can hold out against a general suspension. It may liquidate or become a bank of deposits, but it cannot maintain its relations with its sister institutions except on a basis of common accord. A general suspension followed. Mr. Woodbury proved himself equal to the emergency, and recommended a plan of "keeping the public money under new legislative provisions without using banks at all as fiscal agents." This was the beginning of the sub-treasury system, a new departure in treasury management, and a further evolution in American finance. It still remains, and will no doubt be permanent. Its establishment was necessary because of the absence of a national bank.