Letter from the Secretary of the Treasury, transmitting (pursuant to sundry resolutions of the 17th ultimo) a statement of the actual balance, &c. in the Treasury, on the 1st day of January, 1820; together with a statement of the amount of the public debt redeemable in 1820, 1821, 1822, 1823, and 1824; exhibiting also the interest payable in, and the balance of the annual appropriation of $10,000,000 which will remain unapplied at the close of each year.