The Saint Louis directory for the years 1854-5 :
Important Instructions.

The single rate of letter postage by either of the above
lines, (and the same in respect to tho British lines.) to
or from any point in the United States, (except Oregon
and California.) for or from any point in Great Britain,
is 24 cents, pre-payment optional. Newspapers, each
two cents United States, and 2 cents British—each coun- try to collect its own postage, whether the paper is sent
from, or received in the United States. [Biitbh news-
papers usually come British postage paid by a penny
stamp, equal to 2 cents.] They moat be sent in narrow
bands open at the ends. Letten for the continent of
Europe, to pass through Great Britain, in the open mail,