Chapter I.

The re were very few people upon Platform Number Twenty-one of Liverpool Street Station at a quarter to nine on the evening of April 2—possibly because the platform in question is one of the most remote and least used in the great terminus. The station-master, however, was there himself, with an inspector in attendance. A dark, thick-set man, wearing a long travelling ulster and a Homburg hat, and carrying in his hand a brown leather dressing-case, across which was painted in black letters the name MR. JOHN P. DUNSTER, was standing a few yards away, smoking a long cigar, and, to all appearance absorbed in studying the advertisements which decorated the grimy wall on the other side of the single track. A couple of porters were seated upon a barrow which contained one solitary portmanteau. The re were no signs of other passengers, no other luggage. As a matter of fact, according to the time-table, no train was due to leave the station or to arrive at it, on this particular platform, for several hours.

Down at the other end of the platform the wooden barrier was thrust back, and a porter with some luggage upon a barrow made his noisy approach. He was followed by a tall young man in a grey tweed suit and a straw hat on which were the colours of a famous cricket club.

The inspector watched them curiously."Lost his way, I should think,"he observed.

The station-master nodded."It looks like the young man who missed the boat train,"he remarked."Perhaps he has come to beg a lift."

The young man in question made steady progress up the platform. His hands were thrust deep into the pockets of his coat, and his forehead was contracted in a frown. As he approached more closely, he singled out Mr. John P. Dunster, and motioning his porter to wait, crossed to the edge of the track and addressed him.

"Can I speak to you for a moment, sir?"

Mr. John P. Dunster turned at once and faced his questioner. He did so without haste—with a certain deliberation, in fact—yet his eyes were suddenly bright and keen. He was neatly dressed, with the quiet precision which seems as a rule to characterise the travelling American. He was apparently of a little less than middle-age, clean-shaven, broad-shouldered, with every appearance of physical strength. He seemed like a man on wires, a man on the alert, likely to miss nothing.

"Are you Mr. John P. Dunster?"the youth asked.

"I carry my visiting-card in my hand, sir,"the other replied, swinging his dressing-case around."My name is John P. Dunster."

The young man's expression was scarcely ingratiating. To a natural sullenness was added now the nervous distaste of one who approaches a disagreeable task.

"I want, if I may, to ask you a favour,"he continued."If you don't feel like granting it, please say no and I'll be off at once. I am on my way to The Hague. I was to have gone by the boat train which left half an hour ago. I had taken a seat, and they assured me that the train would not leave for at least ten minutes, as the mails weren't in. I went down the platform to buy some papers and stood talking for a moment or two with a man whom I know. I suppose I must have been longer than I thought, or they must have been quicker than they expected with the mailbags. Anyhow, when I came back the train was moving. They would not let me jump in. I could have done it easily, but that fool of an inspector over there held me."

"They are very strict in this country, I know."

Mr. Dunster agreed, without change of expression."Please go on."

"I saw you arrive—just too late for the train. While I was swearing at the inspector, I heard you speak to the station-master. Since then I have made inquiries. I understand that you have ordered a special train to Harwich."

Mr. John P. Dunster said nothing, only his keen, clear eyes seemed all the time to be questioning this gloomy-looking but apparently harmless young man.

"I went to the station-master's office,"the latter continued,"and tried to persuade them to let me ride in the guard's van of your special, but he made a stupid fuss about it, so I thought I'd better come to you. Can I beg a seat in your compartment, or anywhere in the train, as far as Harwich?"

Mr. Dunster avoided, for the moment, a direct reply. He had the air of a man who, whether reasonably or unreasonably, disliked the request which had been made to him.

"You are particularly anxious to cross to-night?"he asked.

"I am,"the youth admitted emphatically."I never ought to have risked missing the train. I am due at The Hague to-morrow."

Mr. John P. Dunster moved his position a little. The light from a rain-splashed gas lamp shone now full upon the face of his suppliant: a boy's face, which would have been pleasant and even handsome but for the discontented mouth, the lowering forehead, and a shadow in the eyes, as though, boy though he certainly was in years, he had already, at some time or another, looked upon the serious things of life. His nervousness, too, was almost grotesque. He had the air of disliking immensely this asking a favour from a stranger. Mr. Dunster appreciated all these things, but there were reasons which made him slow in granting the young man's request.

"What is the nature of your pressing business at The Hague?"he asked.

The youth hesitated.

"I am afraid,"he said grimly,"that you will not think it of much importance. I am on my way to play in a golf tournament there."

"A golf tournament at The Hague!"Mr. Dunster repeated, in a slightly altered tone."What is your name?"

"Gerald Fentolin."

Mr. Dunster stood quite still for a moment. He was possessed of a wonderful memory, and he was conscious at that moment of a subtle appeal to it. Fentolin! The re was something in the name which seemed to him somehow associated with the things against which he was on guard. He stood with puzzled frown, reminiscent for several minutes, unsuccessful. Then he suddenly smiled, and moving underneath the gas lamp, shook open an evening paper which he had been carrying. He turned over the pages until he arrived at the sporting items. Here, in almost the first paragraph, he saw the name which had happened to catch his eye a moment or two before: