[188] It is calculated that every year nearly fifty thousand postage-stamps rub off letters and newspapers in their passage through the Post-Office. At one time the quality of the adhesive matter was called in question, loud complaint, even ridicule, settling on the theme. Now, however, that the gum is better the number of stamps which "will not stick" is scarcely perceptibly smaller. [189] Only one instance is on record of any violent and wilful attempt to damage a pillar letter-box. This is the more wonderful as the temptation to lift the lid and contribute articles not contemplated by our postage-system must naturally be strong in the eyes of our City Arabs. A singular accident befell one of these letter-boxes (1862) in Montrose. A quantity of gas from the street pipes seems to have got into the box, and a night-watchman to have ignited it by striking a match on the top in order to light his pipe. The top was blown off and the pillar-box hopelessly damaged, although the watchman and the letters escaped without injury. [190] The following announcement from the postmaster of Manchester, as given in a bill dated 1721, contrasts strangely with the latitude allowed now. "The post goes out to London," says he, "on Monday, Wednesday, and Saturday, at nine o'clock in the morning. It will be best to bring the letters the _night before the going out of the post_, because the accounts and baggs are usually made up _over-night_." In these days, when we may post up to within five minutes of the despatch of a mail, and letters for America may be posted within ten minutes of the sailing of the packet, we cannot be too thankful for our privileges. [191] This arrangement does not apply to foreign letters coming to or going out of this country. [192] The number of registered letters last year was over two millions, or one registered letter to about three hundred ordinary letters.