"And now," he concluded, "I am going to give you a further opportunity to distinguish yourself. I have in hand some work, the successful execution of which demands a man who can be depended upon to keep his head and his nerve under the most trying conditions, such as those which existed when you took those soundings and measurements, under, fire, the other day; indeed it was that piece of daring which caused me to select you for the work. You may perhaps have observed a steamer shipping mines--You did? Yes, I thought you would. Well, that steamer is the _Koryu Maru_, a very smart boat, steaming twenty-two knots, which I have had fitted as a mine-layer. The Russians have passed to and fro over our mine-field off Port Arthur, and have had full opportunity to learn that our mines are so harmless that they may be regarded as negligible, so, now, I propose to teach them a new lesson. The mines which the _Koryu_ is shipping are not harmless; on the contrary, they are exceedingly formidable affairs, containing charges ranging from one hundred to two hundred pounds of Shimose explosive, and they are arranged to automatically adjust themselves to varying depths of water. The ship which strikes one of them will be done for! Having told you so much, you will readily understand that they are ticklish affairs to handle, particularly when it comes to laying them; hence my choice of you, Captain Swinburne, to supervise and execute the task. I shall be glad if you will go aboard, at your earliest convenience, and make yourself thoroughly acquainted with the mode of handling them, which is essentially different from that of handling the mines to which you have been accustomed."