“Good God! is that really necessary? It seems a horrible thing to do, when they are trusting us and taking us as their guests,” he said in a low, trembling tone. “Yes,” she replied, with a well simulated shudder; “it is horrible, I know, but it is necessary. Remember that we have solemnly sworn war to the knife against this people, and that, armed as they are, all open assault is impossible; therefore they must be struck in secret, or not at all. “Now listen. I have brought with me a flask which my grandfather gave me a day or two before he died. It contains enough of a tasteless, powerful narcotic to send twenty people to sleep so that nothing will wake them for several hours. I will give you half of this to-night and keep half myself, and one of us must find an opportunity to get the crew to take it in their wine, or whatever they may drink, for they are sure to have one or two meals while we are on board. “To-night I will send instructions in cypher to the Lossenskis in Vorobièvŏ to tell them that as many as possible of the Friends must be ready for action by eight to-morrow night, and must wait, if necessary, night after night till we come. If all goes well we shall select the new crew of the _Ithuriel_ from them before we see two more sunrises. In fact, by the time we return from our voyage we must have absolute control of the vessel. “Such an opportunity as this will never offer itself again, and I, for my part, am determined to risk anything, not excepting life itself, to take the best advantage of it. It would be madness to allow any scruples to stand in our way when the Empire of the Air is almost within our grasp.” “And none shall, so far as I am concerned,” replied Serge in a low, steady voice that showed that his horror at the deed they contemplated had succumbed, at least for the moment, to the tremendous temptation offered by the prospect of success. “Spoken like a true Romanoff!” said Olga, looking up at him with a sweet smile of approval. “As the deed is so shall the reward be. Now we must get back to our friends. We will find a means to get an hour together before to-night to arrange matters further, and we will have Alan and Alexis to supper with us after the opera, and then I will begin my share of the work. Once the air-ship is ours, we can hide her in one of the ravines of the Caucasus, hold a council of war in the villa at Vorobièvŏ, and set about the work of the Revolution in regular fashion.” The rest of the day was spent in accordance with the plans already agreed on. Olga and Serge had tea together in their private room before going to the theatre, and put the finishing touches to their plans for the momentous venture of the following day; and Alan and Alexis, all unsuspecting, accepted their invitation to supper after their return from the opera-house.