A Short investigation into the subject of the alleged superfluous issue of bank notes, the high price of bullion, and the unfavourable state of the foreign exchanges : in two letters, extracted from the Times newspaper, of the 18th and 20th of April 1811 : to which is added the substance of the Earl of Rosse's speech in the House of Lords, on the exchange and currency of Ireland, taken from the Morning Post of the 17th of April.