For the farther support of our opinion, we have the vast countries which are at present completely without the sphere of the commercial activity of the world, and which, upon the opening of the Canal, will furnish a contingent which cannot be estimated now, but which will be considerable. Abyssinia, Yemen, Hedjaz, Mascata, and the coasts of Africa, will deliver quantities of merchandize; such as the coffee of Yemen and Abyssinia, gum arabic, wax, skins, ivory, wool, indigo, &c. &c. Mules and animals for the slaughterhouse abound in Abyssinia, and are sold at a low price. A mule may be had from 25 to 100 _fr._, an ox for 10 _fr._, a sheep for 3 _fr._; timber and cabinet woods abound in the vast forests which have never felt the axe. Along the coasts of the Red Sea are very rich mines of sulphur, which have just begun to be worked; lead mines, quarries of marble and porphyry; extended beaches suitable for the establishment of salt pits, &c. &c. New occupations will arise, such as whale and cachalot fishing in the South Seas; pearl fishing in the Persian Gulf and Indian Sea, as well as the pursuit of mother-of-pearl, tortoise-shell and coral. A great part of the Mediterranean fishermen will transport themselves to the Indian Sea, to pursue their occupation, and increase the activity of the navigation in the Maritime Canal. We may therefore be sure that the cutting through of the Isthmus will increase ten-fold the operations of commerce and navigation; that, as with every undertaking based upon a true principle, the consequences cannot be calculated, and that the idea most exaggerated in appearance, will always be surpassed by the reality. As, however, we are addressing ourselves to the commercial world, and have to convince all minds, even the most timid, it is necessary that we should fix upon a figure, and that this figure should not startle any one. We have adopted that of 4 milliards (4,000,000,000) of francs, answering to 6,000,000 tons, which, according to what we have been showing, is without doubt, already exceeded at present, or certainly will be, before the close of the undertaking. We have likewise assumed that of the 6,000,000 tons, 3,000,000 only will take the route of the Canal. If we had followed the method of estimating adopted in the railway schemes, it would be necessary to make a statement of all the merchandize exchanged between Europe and America on the one part, and Indo-China on the other; then to multiply the figure thus obtained by a coefficient, never less than 3, and which sometimes reaches to 10. The result of this operation would give an enormous product, nevertheless probable. But to remain within the circle of ordinary ideas, instead of tripling the actual figures, we have diminished them by half. The commercial activity obtained according to these bases, will produce an annual revenue from passage dues, at 10 _fr._ per ton, of _fr._ 30,000,000