Bearing in mind the great quantity of correspondence conveyed by the post, as well as the hurry and bustle in which letters are often written, it is not astonishing that writers should sometimes make mistakes in addressing their letters; but it will perhaps create surprise that one year's letters which could neither be delivered as addressed, nor returned to the senders through the Dead-letter Office, were over half a million in number! It is curious to note some remarks written by the Post-office solicitor in Edinburgh eighty years ago with respect to misdirected letters. He speaks of "the very gross inattention in putting _the proper_ addresses upon letters--a cause which is more productive of trouble and expense to the Post-office than any other whatever. In fact, three out of four complaints respecting money and other letters may generally be traced to that source, and of which, from the proceedings of a few weeks past, I have ample evidence in my possession at this moment." Letters posted in covers altogether innocent of addresses, number 28,000 in the year; and the value in cash, bank-notes, cheques, &c., found in these derelict missives is usually about £8000. Letters sent off by post without covers, or from which flimsy covers become detached in transit, number about 15,000; while the loose stamps found in post-offices attain the annual total of 68,000. The loose stamps are an evidence of the scrambling way in which letters are often got ready for the post, and probably more so of the earnest intentions of inexperienced persons, who, in preparing stamps for their letters, roll them on the tongue until every trace of adhesive matter is removed, with the result that so soon as the stamps become dry again they fall from the covers. Letters which cannot be delivered in consequence of errors in the addresses, or owing to persons removing without giving notice of the fact to the Post-office, are no less than 5,650,000, such being the number that reach the Dead-letter Office. But of these it is found possible to return to the writers about five millions, while the remainder fail to be returned owing to the absence of the writers' addresses from the letters. The other articles sent to the Dead-letter Office in a year are as follows, viz.:-- Post-cards, nearly 600,000 Book-packets, " 5,000,000 Newspapers, " 478,000 As regards the book-packets, it is well to know that a large part of the five millions is represented by circulars, which are classed as book-packets, and the addresses on which are not infrequently taken by advertisers from old directories or other unreliable sources.