"I'll report the matter to the police," declared the Sub. "Do so," was the calm reply. "Would the police believe such an accusation against a prominent member of the Watch Committee? Supposing--even supposing, mind--that they did take action and search my house. What would they find--nothing. Can't you realize that I hold the whip hand?" "You can jolly well do what you like," answered the Sub. "Very good. To-morrow I take out a summons. If between the present time and the date of the hearing you decide to accept my terms I will immediately withdraw the summons and your dog's life will be saved. Good evening!" CHAPTER II An Ultimatum Confronted with the mysterious problem Sub-Lieutenant Fordyce made his way to a secluded part of the sea-front. With a true sailor's instinct he paced up and down, debating with himself as to the course of action he should pursue. If only he had a witness to the conversation. He racked his brains to formulate a scheme whereby he could discuss the matter again with Councillor Mindiggle, this time with a third person unseen but within earshot. Failing that there was little use in reporting the matter. As the fellow said, it was one man's word against another's, and the charge would appear so preposterous that it would stand no possible chance of being substantiated. For similar reasons he dismissed the idea that he should report the case to his skipper, the Hon. Derek Stockdale, Lieutenant-Commander of R19. Mindiggle's statement that the Sub had informed him of the vessel's date of departure and destination would be an awkward factor in the matter. So, rightly or wrongly, Noel Fordyce resolved to keep secret the interview with Councillor Mindiggle, at least for a time. Meanwhile he would fight to the bitter end to save Flirt from the lethal chamber. Having shut the front door on his caller, Councillor Mindiggle returned to his study. As far as the rest of his household was concerned he was free from interruption. He had no wife; his housekeeper was stone deaf; the servant who had shown Fordyce into the room was going out for the evening. It would have been a great surprise to Fordyce if he had known that there had been a third person within earshot, but such was a fact. Unlocking a door leading into an inner room Mindiggle released a man who, although he looked an Englishman, spoke in Russian. "Don't you think, comrade, that you were much too rash?" he asked anxiously. "Not at all, Boris Platoff," replied Mindiggle coolly. "On the contrary, I have hopes that we shall be relieved of a considerable amount of bother and danger. The diamonds will be in Petrograd before the great day. That young man will consent to my terms. It's wonderful what a hold one has over an Englishman who owns a favourite dog. Inform the police--bah! He would not dare risk the ridicule his action would bring upon him. Those diamonds will go in the submarine, you mark my words."