The letter which we publish from our Correspondent who accompanied the troops to India, must be preceded by a few words of explanation as to the circumstances which induced the Government to send a large party of officers and a small reinforcement of men by the Canadian Pacific route. That route for Calcutta is a little longer in point of time than the movement by the Cape. It was recognised from the first that in time of war it would not be desirable to depend upon the Suez Canal route, but it had been fully intended to employ the Cape line. Unfortunately, however, immediately after war was declared by France against us, communication with Sierra Leone was in some way cut. Some time passed before we heard what had happened. Then it appeared that, prior to the declaration of war, the French Governor of Senegal had been warned of the date at which it was intended in France to declare war, and was directed to dispatch from Goree a powerful expedition as quietly and secretly as possible. This, taking advantage of the concentration of the English fleets in the Baltic and Mediterranean, was to sail from Goree with sealed orders to be opened at sea, which directed the commanding Admiral, on a date named, to move straight upon Sierra Leone, and to attack it on the day that the declaration of war was issued in Europe. It should be noticed, as a question of method and of the facilities presented by steam for such operations, that no great gathering of ships was allowed to attract attention to the preparations in Senegal, and ship after ship arrived, received its equipment, and departed alone, with orders to rendezvous on a given day at a stated point in mid-ocean, fixed by latitude and longitude. In this way, without attracting attention, and without difficulty, the great fleet was collected, and moved off at the time named under the orders of the Admiral and General upon Sierra Leone. The garrison of Sierra Leone has always been kept at a low ebb, because of the unhealthiness of the place. It was to have been reinforced in view of war, but this had been postponed. The movement was a complete surprise, and though indignant remonstrances appeared in all the English papers, and in the letter addressed by the Governor of Sierra Leone to the French Commander-in-Chief, the fact remained that Sierra Leone had, for the time being, passed into the hands of the French. Although statements were freely made that such an outrage had never been committed since the beginning of the world, and most English people believed them, there was no difficulty in showing that precedents from the actions of all countries were in favour of the French. However, apart from the merits of that question, the plain fact of the matter was that, with Sierra Leone in the hands of the French, our whole route _viâ_ the Cape to India was seriously disturbed.