“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.

The seemingly innocent and pleasant little supper, which passed off so merrily in the private sitting-room occupied by Olga and Serge, had but one incident which calls for description here, and even that was unnoticed not only by the two guests, but by Serge himself.

Just before midnight, Olga proposed that, in accordance with the ancient custom of Russia, they should drink a glass of punch, brewed in the Russian style; and as she volunteered to brew it herself, it is needless to say that the invitation was at once accepted.

The apparatus stood upon a little table in one corner of the room. For a single minute her back was turned to the three sitting at the table in the centre; her share in the conversation was not interrupted for an instant, and no one saw a couple of drops of sparkling, blue liquid fall into each of three of the glasses from the little flask that she held concealed in the palm of her hand, and when she turned round with the little silver tray on which the glasses stood, the flask was resting at the bottom of her dress-pocket.

She handed a glass to each of them, and then took her own up from the side-table where she had left it. She went to her place, and, holding her glass up, said simply—

“Here’s to that which each of us has nearest at heart!” and drank.