Half an hour later Orloff had completed his task, and took his departure, and landing once more on the quay, he made his way to the tavern and joined the girl.

‘Have you succeeded?’ she asked anxiously.

‘Yes. But a sailor kept guard over me, and I was afraid the plan would have miscarried; I racked my brains trying to find an excuse for freeing myself from him. But fortune favoured me. He stopped to mumble a prayer before an ikon, and I seized the opportunity to get into the Tsar’s bed-chamber, where I planted the machine. It is set for thirty-three hours, and will go off to-morrow night when the Tsar has retired to his couch.’

The girl looked frightened, and said nervously:

‘Well, let us leave here, and get back without a moment’s delay.’

‘Don’t worry yourself, my child; there is plenty of time. I am going to dine first.’

He ordered dinner for two and half a bottle of vodka beforehand by way of an appetizer, and, having drunk pretty freely, he and the girl strolled out while the dinner was being prepared.

It was a glorious evening. The sun was setting. The heavens were dyed with crimson fire. In the clear atmosphere the masts and rigging of the vessels stood out with a sharpness of definition that was remarkable. There was no wind. The water of the gulf was motionless.

Suddenly there was a tremendous shock as if a great gun had been fired, and in a few moments a cry arose from a hundred throats that something had happened on board the Imperial yacht. The air about her was filled with splinters of wood. Men could be seen running along her decks in a state of great excitement, and she appeared to be heeling over to the starboard side. ‘Her boilers have burst,’ cried the people, as they rushed pell-mell to the quay, while from all parts of the harbour boats were hurriedly making their way to the North Star, as it was thought that she was foundering.

THE SECOND ACT—THE UNRAVELLING OF THE PLOT.