The two friends disappeared in the fog, in a southerly direction from the house and after going for about a quarter of a mile, Jim called a sudden halt.

"Hold on, John," he said, "there is something coming our way."

"I don't hear anything," replied Berwick. "What does it sound like?"

"It's a vehicle of some kind," declared Jim.

"Now I hear it," admitted the engineer, "and I reckon that it is a carriage of some kind."

"This is as good a place as any," remarked Jim. "It's lucky there is a fog because there is no cover to get behind."

"Coming direct our way," said the engineer, as the thud of horses' feet could be heard distinctly, and the low roll of wheels over the ground.

The two comrades moved quickly to one side, and they saw emerge from the fog a high-stepping team drawing a closed carriage. The horses shied at what they saw at the side of the way, but the coachman pulled them quickly to their course and drove rapidly on. It was impossible to get even a glimpse of the occupants of the carriage.

"Me lord Duke," said Jim, "going to his ancestral castle."

"That's surely where he is bound for," declared the engineer.

"There goes the gate," cried Jim, as the sound of the iron closing came to his ears.

"The plot thickens," remarked the engineer; "that wasn't an ordinary turnout by any means."

"We will investigate this business before morning," determined Jim, "but there is nothing gained by rushing,—better let things settle. What do you say, John, to getting something to eat?"

"I'm with you there," agreed Berwick. "I may have been hungrier in my life before, but I can't remember."

"No Russian Duke this time to help you out, eh?" queried Jim.

"Don't mention that," cried the engineer; "I'm in no need of an appetiser."

If you have read "Frontier Boys in The Sierras," you will recall the chief engineer's account of his experience while traveling from St. Petersburg to the frontier, when he appropriated the Grand Duke's hamper while his Highness was wrapped in the deep stupor of sleep. He had told it with much nerve and vivacity, and Jim could recollect very clearly the scene in the warm engine-room of the Sea Eagle, with the stormy rain sweeping the decks outside, and the good old crowd of Juarez, and the boys, listening to the engineer.

"I have a hunch that we are going to get something to eat soon," remarked Jim encouragingly.

"Shall we strike the trail back to the city, and return in the small wee hours to call on our friends in the castle?" asked Berwick.

"No need of that," replied Jim; "I am sure we can find a place to eat down by the beach."

They had a little difficulty in finding a break in the cliffs that walled the water front, but finally they discovered a cleft in the solid rock and they were able to make a steep descent over broken bowlders. They were halfway down when Jim stopped so abruptly that the engineer stumbled against him.

"See that man sitting against that rock," he whispered; "he looks as if he were asleep."

"Maybe drunk," remarked John Berwick.

"Or a sentinel for the castle," put in Jim.

He felt around at his feet until he picked up a suitable rock, then closely followed by the engineer, he approached cautiously the figure against the rock, then Jim deliberately went up and looked into the man's face.

"He's dead," said Jim in a quiet voice. "I've seen too many like him not to know."

"Who do you suppose got him," queried the engineer.

"Those friends of ours on the hill, no doubt," said Jim. "Yes, it's their work," he declared, as he ran his hand along under the man's coat; "stabbed in the back." The unfortunate fell heavily against Jim's shoulder and one of his legs straightened out convulsively.

"You have a pretty fair quality of nerve, my friend," remarked the engineer in cool admiration.

"Strike a light, John," said Jim, "and see if we can get a line on this poor fellow."

The engineer drew a pretty trinket of a match box from his upper vest pocket and struck a match near the face. There was such a direct living look in the man's half-closed eyes, that the engineer dropped the match with an involuntary expression of surprise and shock.

"What's the matter with you, John?" asked Jim with a touch of sharpness in his voice. The engineer was a man of usual nonchalant nerve, whose bravery had always seemed a by-product of his nature and not due to an effort of the will, which gave point to Jim's question.

"I am getting shaky in my old age, Captain," replied the engineer.

"No danger of that," replied Jim.

Again a match was lit and this time Berwick held the flame close to the dead man's face. They saw that he was not over forty years of age, with a heavy square jaw, a full straw colored mustache, and hazel eyes. He wore a light gray fedora hat and his suit was also of gray, loosely worn. He was squarely built, and slightly below the middle height. There was absolutely nothing to indicate his business, or his station in life. Whatever possessions he may have had on him had been taken.

"What was the reason for this, John?" questioned Jim, as he gently laid the dead man back against the rock.

"Robbery?" suggested Berwick.

"They are none too good," replied Jim, "as I can testify from personal experience. But I reckon that there is more back of this than that.

"Now I may be mistaken, but in my opinion this man was a United States detective and he was hot on the trail of this gang of pirates and smugglers. I used to know a number of these fellows in New York and there is something about them that marks them to my mind."

"I bet you have hit it right," said Jim, "but why did they not hide the body?"

"Possibly they are so safe in this section that they don't take the trouble to cover up their crime," remarked the engineer tentatively.

"Or they may be intending to come back to-night and dispose of the body," said Jim.

"That's more apt to be it," agreed the engineer.

"It might be a good scheme to lie in wait for a while, and see if any of these hounds come back on their trail," suggested Jim.

The engineer of the Sea Eagle who was at present out of his element, drew a deep sigh and likewise drew up his belt a couple of holes, which was his alternative for a meal, that he seemed fated to go without. The unsympathetic Jim grinned at his comrade in arms.

"I tell you, Chief," he said, "we will catch one of these grand rascals and cook him a la cannibal."

"I would be most happy to," replied the engineer suavely and savagely.

"We will move down the ravine a ways," ordered Jim.

"My idea was that they would come down from the top of the cliff," said the engineer with cool criticism.

"That was my idea, too," said Jim cheerfully; "then we might follow them without too much chance of being caught ourselves."

"You are certainly long on strategy, James," remarked the engineer.

"Hello, Berwick," exclaimed Jim; "there is a light ahead."

Sure enough on the beach at the mouth of the ravine shone the yellow light from a small square window. They crept up carefully to the place. It was rather a curious affair. It was simply two old street cars joined together by a wooden vestibule; one was used as a sleeping room the other was a tiny beach eating place. Jim looked in cautiously through the window and his eyes widened and his hand went involuntarily to where his revolver usually hung. He remained there a full half minute taking in the scene within while the engineer stood a little ways back in apparent indifference, but he was carefully taking in the whole situation. A short distance away the waters of the bay were lapping through the darkness onto the beach.

He noticed that there were a number of heavy tracks going towards the door of the odd little restaurant, and they were quite recent. He listened intently to hear, if possible, who might be inside, but while he could distinguish voices, there were only a few noncommittal sounds. He wondered what the captain found so interesting, but just then there came a scuffling of chairs on the floor within and the sound of guttural voices. Jim drew back suddenly, and in evident alarm. The door was slowly opened and a heavy figure dressed in sailor garb lurched out into the darkness followed by a stealthy form.