... showing the Increase of Expense in the British Post Office, consequent upon the Increase of the Number of Letters under the new System; the Rate per Letter of the Cost of additional Letters, and ... increase of the total, since 1839, is 418 per cent.; of paid in coin, since 1840, 39 per cent.; of unpaid, since 1841, 21 per cent.; of stamps, since 1841, 183 per cent. Cost diminished by ... of computers including obsolete, old, middle-aged and new computers. It exists because of the efforts of hundreds of volunteers and donations from people in all walks of life. Volunteers and...