Copy letter from Robert William Frederick Harrison, to the Superintendent, Dead Letter Office, Washington D.C. Acknowledges with thanks the receipt of the Superintendent's letter of 28 December, transmitting two receipts from the librarian of the United States Naval Academy at Annapolist, dated 2 November 1899, for copies of the 'Philosophical Transactions of the Royal Society', the postage of which was insufficiently prepaid. 8 January 1900