The intercourse between these quarters of the world, and also of each of these with the United States, is already of great importance, and will daily become more and more important, while there is, at present, no mail communication between them. A regular, and frequent mail communication in that quarter has become indispensably necessary. While this fact must be admitted, it is of great importance to have as many of the points of combination under the British flag as possible. Keeping this desirable point in view, it is necessary to observe, that this must be done, taking Havannah into the line; because, if it is not included in the British line, it will be forthwith occupied by parties from the United States, and letters, passengers, &c. both for all North America and for Europe, from the West Indies, will go by these States, New York for example. The arrivals and departures of the steam packets on this line must also be calculated, and fixed so as to agree with the arrivals and departures of the outward and homeward-bound mails by Fayal, for North America, and also for all the West Indies, southwards to Havannah and Mexico. The desirable object of bringing the most important central and trans-shipping points under the British flag, can only be gained by making in this case the run of the steamers to be from Halifax, by New York, to the Havannah; or from New York, by Havannah, to Jamaica. While the various ways by which this latter could be effected are (p. 019) here stated, still the former will be found to be the most economical, certainly not the most inconvenient, and, on many accounts, the preferable mode. At Havannah the North American steamer would meet in the most regular manner, and to a day, the steamers from Havannah to Vera Cruz; and from Havannah to Jamaica, Barbadoes, &c. &c. The route and time of these boats would be as follows:-- Geo. Miles. Days. Halifax to New York 520 3-1/2 New York to Havannah 1140 6-1/2 Stop at Havannah, say 2 Havannah to Halifax, by New York. 1660 10 ---- ------ Totals 3320 22 Two powerful boats would be perfectly sufficient to perform this work, giving two mails each month; first cost 48,000_l._, yearly charges 12,400_l._ Each boat would be at sea 20 days each voyage = 40 monthly = 480 yearly; coals daily, 25 tons = 12,000 tons yearly, at 25_s._ = 15,000_l._