Next, as to the rate of speed--it is calculated throughout the voyage, at the rate of 200 geographical miles per day. In running before the wind, and with the monsoons, the vessels would make more, and in working against them, less; still, on the whole voyage, or from the Cape, for example, to Calcutta, and from Calcutta to the Cape again, the time specified would be sufficient for the work and the distance; while in taking a circuitous course to avoid the force of the monsoons, the steamers would make up by increased speed for the increased distance. The N. E. monsoon may, at anytime, be stemmed by a steamer of large power, and such as is now recommended. The S. W., which is the most formidable, may be overcome by the boats on their return,--if by the Red Sea, by making first a course to the southward, and then standing N. W. with the monsoon on their beam. By the Cape of Good Hope, the difficulty would be decreased in this respect, as the boats running southward to gain the Mauritius from Ceylon, would, by keeping to the southward, soon get out of their vortex; while the steamers between Bombay and Ceylon have only to keep in shore to avoid the greatest force of the monsoon either way, and from either quarter. In crossing from the Red Sea to Bombay, the strength of the N. E. (p. 080) monsoon would be avoided by keeping in with the Arabian, and afterwards with the eastern Asiatic coast. Taking the line of communication, therefore, between Great Britain and the Eastern World, by the Cape of Good Hope, the expense beyond that which the line of communication by the Mediterranean and the Red Sea would occasion, would be, in capital, 112,000_l._, and in yearly expenditure, 39,128_l._ The point to consider is, will the advantages, and the security to be obtained by taking the former in preference to the latter route, prove a sufficient compensation for, and a warrant to go to the additional and increased expense? The answer, minutely considering every circumstance, will be, that they are. The obstruction which the land barrier between Alexandria and Suez offers, and must always offer, even when unobstructed by hostile force, to the conveyance of parcels, packages, and goods, is a great drawback indeed. The competition, also, by steamers belonging to other parties and states, would, as regards all these, be a great drawback on this line; and to which must be added, the increased difficulties and drawbacks which would arise in the event of hostilities taking place between any of the great powers connected with the affairs of the Mediterranean. On the other hand, the free communication which would be had,--free also as it would be, or nearly so, from any serious competition by the Cape of Good Hope, the carriage of every thing being in almost every point and place under the British flag and revenue laws--would render this line much more profitable than the line by Egypt and the Red Sea could ever be.