It possesses important advantages over any other road both for freight and passenger traffic. Being of uniform gauge, no change of cars will be necessary from Sarnia to Portland; and being also under the management of one corporation, it affords better facilities for the protection of passengers and the preservation of their baggage than where they are required to pass over lines under the control of different and perhaps conflicting corporations. Having only one set of officers quartered upon its exchequer, it can afford to do business at lower proportionate rates, than a number of shorter lines, each having a different set to salary, while the delay and vexation which not unfrequently arise from short routes, being compelled to wait upon each other's movements, will all be avoided, which is certainly no small consideration both to passengers and shippers. The harbor of Portland is one of the finest and most eligible in the world, and our immediate connection with a point of such importance is of itself a matter deserving particular mention. Portland district, as appears by the official statement of the tonnage of the United States, made to June, 1857, then owned 145,242 tons of shipping, being the ninth port in the Union in point of tonnage; she is very largely interested in the West India trade, her annual imports of molasses exceeding those of any port in the United States. She offers, therefore, to the Western States, peculiar facilities for procuring at a cheap rate the products of the West Indies. The harbor is without any bar, and so easy of access that no pilots are required, and strangers, with the sailing directions given in the American Coast Pilot, have brought their ships into it with safety. There are no port charges, harbor dues, or light-house fees, excepting the official custom house fees. The Grand Trunk Railway is likely to become the avenue through which an immense tide of immigration will pour into Michigan. It will be a favorite route for emigrants, who will thus avoid the rascally impositions of the swindlers and Peter Funks of New York, who have given that city an unenviable notoriety throughout the world. It is predicted that more immigrants will hereafter come by the new route than by all others put together. There is no valid reason why this prediction should not prove strictly true. This is therefore a matter likely to be of vast importance to our State, with a large share of her territory as yet an unbroken wild, offering tempting inducements to the hardy settler.