Letters for Russia and Poland are also treated as wholly unpaid, if the full postage has not been paid in the first instance. Letters to or from Ceylon, Australia, New Zealand, British West Indies (except Turk's Island), Honduras, and St. Helena, posted wholly unpaid, or paid less than one rate, are detained and returned to the writers for postage. If the letters should be paid with one rate (paid for half an ounce, for instance, when the letter weighs more than half an ounce), they are forwarded (except in the case of New Zealand), charged with the deficient postage and sixpence as a fine. Letters for New Zealand must be fully prepaid. Letters for nearly all our remaining British colonies, if posted unpaid, either wholly or in part, are, on delivery, charged sixpence each in addition to the ordinary postage. Letters intended to be sent by private ship should, in all cases, have the words "By private ship," or "By ship," distinctly written above the address. The postage of letters forwarded by private ship is sixpence--if the weight does not exceed half an ounce--and the postage must generally be prepaid. Exception is made to most of our North American and African colonies, to which places prepayment by private ship is not compulsory. (See table in the _British Postal Guide_.) When the route by which a foreign or colonial letter is to go is not marked on the letter, it will be sent by the principal or earliest route. In some cases, the postage paid (provided it be by stamps) is regarded as an indication of the wish of the sender, and the letters are forwarded by the route for which the prepayment is sufficient. Thus, letters for Holland, Denmark, Norway, &c. which, as a rule, are sent _viâ_ Belgium, are sent _viâ_ France, if the prepayment be insufficient for the former, but sufficient for the latter route. _North American and Indian Mails._--Letters for passengers on board the Cunard mail packets for America touching at Queenstown, provided they be addressed to the care of the officers in charge of the mails on board such packets, _and be registered_, may be posted in any part of the United Kingdom up to the time at which registered letters intended for transmission to America by the same packets are received, and they will be delivered on board the packets at Queenstown. Letters for passengers on board the Mediterranean packets about to sail from Southampton for India, China, Australia, &c. and the Canadian mail packets touching at Londonderry, may, under similar conditions, be posted up to the same time as registered letters for India and Canada. The letters should be addressed thus: "Mr. ----, on board the mail packet at Queenstown, Londonderry, or Southampton (as the case may be), care of the officer in charge of the mails."