The course of events in the Black Sea, since our fleet for the time evacuated it, has been as follows:—It appears that as soon as the Russian Fleet was driven off the sea into harbour, immediate steps were taken by the Russian authorities to withdraw the troops which had been gathered for the purpose of reinforcing the troops already landed in Bulgaria. Unable to pass by sea they were useless for that purpose; and it was hoped, if they were sent off at once to reinforce the armies opposing Austria, that a successful action against that Power might enable the victorious army, co-operating with the army already in Bulgaria, to make the passage through Roumania by land and, at least, ensure the safety of the expeditionary force in Bulgaria. Perhaps it might be possible in that case to secure the object, dear to the heart of the Czar, of so strengthening that expeditionary force as to enable it to crush the Bulgarian Army. The deepest anxiety prevailed in Russia as to the fate of those troops, somewhat rashly committed to the sea expedition, no sufficient allowance having been made for the prompt action of the English Fleet. It was some time before the Russian Fleet, which had retired to Sebastopol, discovered that the English Fleet had actually evacuated the Black Sea. Sir George Tryon had left some cruisers as long as possible to disguise the movement. When these also disappeared, a fear was entertained that this was a mere ruse to draw the Russian Fleet away from Sebastopol in order to crush it in the open sea. We regret to say that it was through the telegraphic dispatches to the English newspapers that, by various indirect channels, the news first reached the Russian Government that Trebizonde had been evacuated and, subsequently, that the English Fleet had passed into the Mediterranean. It was, however, not till Sir George Tryon had actually reached Malta that they were fully aware that the Black Sea had been evacuated. Then it was, after a day of hesitation as to the best course to be pursued, decided to establish touch with the Russian Army in Bulgaria, all communication with which had been cut for some time. As, however, that army—not without difficulty—had maintained its telegraphic communication with the sea, this was effected soon after the cruisers had reached the coast, in the neighbourhood of Varna.