dropped into a letter-box it is like a spoken word, it cannot be
recalled.

After letters come postcards, which were introduced into this country in
October, 1870, and have proved a great convenience to many people,
saving them both time and money. By means of reply postcards you can
make sure of an answer from a correspondent without putting her to any
expense or to any trouble worth mentioning.

The back of the postcard is for the message; nothing must be put on the
front except the address. This limitation of space is useful for the
cultivation of brevity; but those who have a great deal to say may
derive consolation from the fact that on the back of a postcard you can,
by writing small, easily put at least four hundred and sixty words! We
do not, however, say that such a performance, good enough for amusement,
would be like that of a woman of business.

All business letters ought to be preserved. They should be folded neatly
longways and all of a size, and docketed, as it is called--that is to
say, the date and the name of the sender and his (or her) address, and
the subject, should be put on the back thus:

6th September, 1886.
MARTIN ROSE AND CO.,
Liverpool.
Remittance, £10 19s. 2d.

Do not, however, crowd these particulars together, as has been done here
for convenience in printing; leave a considerable space between the
first and second, and the third and fourth lines. When letters are