The land defences of Port Arthur were exceptionally strong. A range of forts, of which the Kwang-chin Hill already mentioned was the most important, commanded the harbor entrance; and another range of batteries, with the most powerful and up-to-date garrison ordnance, surmounted the hills which surround the town and protect it on the other side. Another line of forts guards the entrance channel on the west side, the most important being Wei-yuen. It seemed, indeed, undoubted that Port Arthur was impregnable from the sea, though at the beginning of the war European experts were not inclined to dogmatize as to the possibilities of its being stormed from the land side. As for the fleet, if it were lying in the West Harbor or in the East Port under the shadow of Kwan-chin, it would probably be perfectly safe from attack; but, on the other hand, it will be seen that there was a danger that the narrow entrance channel might be blocked up by an enterprising enemy, in which case the Czar's ships, even if they were the finest in the world, would be useless for all the essential purposes of naval warfare. This attempt to "cork up the bottle" was, indeed, nearly carried out by Admiral Togo in the course of the fortnight following the outbreak of war. [Sidenote: Another Russian Disaster] Two days after the great attack another disaster befell the hapless Russians. With this the Japanese fleet, which had retired temporarily to the Elliot Islands in the Korean Gulf to refit and repair injuries, had nothing to do. It was solely due to carelessness and mischance; and while illustrating the state of demoralization that existed at Port Arthur, it contributed to spread that demoralization still further among the already sufficiently harassed forces of the defenders. The mine transport _Yenesei_, which, with her sister ship the _Amur_, was engaged in superintending the mine defences of the harbor entrance, observing a submarine mine which had become detached floating on the surface of the water, approached it for the purpose of firing upon it and thus removing an obvious danger to the ships lying at anchor. Unfortunately, in the excitement of the process, Captain Stepanoff, who was in command, allowed his ship to drift upon a neighboring mine. A terrific explosion followed, and the _Yenesei_, with a yawning hole in her bows, began at once to settle down. An attempt was made to lower the boats, but the catastrophe was so sudden and unexpected that little could be done. Captain Stepanoff went down with his ship, and there perished also, either from the direct effects of the explosion or from drowning, the engineer, two midshipmen and ninety-two men of lower rank. Not only was this terrible disaster damaging to the _morale_ of the fleet, but it deprived Admiral Alexeieff of a valuable ship and of stores which he could ill spare. The _Yenesei_ was built at Kronstadt in 1898. She was of 2,500 tons displacement, with a speed of 17-1/2