"Yes?" she gasped, in a half-whisper, bending to me eagerly, unable to sufficiently conceal the terrible anxiety consuming her. "And you—did you go aboard her?"

"Yes," was the only word I uttered.

A silence fell between us, and as my eyes fixed themselves upon her, I saw that from her handsome mobile countenance all the light and life had suddenly gone out, and I knew that she was in secret possession of the key to that remarkable enigma that so puzzled me.

Of a sudden the door opened, and a voice cried gayly—

"Why, I've been looking everywhere for you, Muriel. Why are you hidden here? Aren't you coming?"

We both turned, and as she did so a low cry of blank dismay involuntarily escaped her.

Next instant I sprang to my feet. The reason of her cry was apparent, for there, in the full light of the golden sunset streaming through the long open windows, stood a broad-shouldered, fair-bearded man in tennis flannels and a Panama hat—the fugitive I knew as Philip Hornby!

I faced him, speechless.

CHAPTER IV

IN WHICH THE MYSTERY INCREASES

Neither of us spoke. Equally surprised at the unexpected encounter, we stood facing each other dumbfounded.

Hornby started quickly as soon as his eyes fell upon me, and his face became blanched to the lips, while Muriel Leithcourt, quick to notice the sudden change in him, rose and introduced us in as calm a voice as she could command.

"I don't think you are acquainted," she said to me with a smile. "This is Mr. Martin Woodroffe—Mr. Gordon Gregg."

I bowed to him in sudden resolve to remain silent in pretense that I doubted whether the man before me was actually my host of the Lola. I intended to act as though I was not sufficiently convinced to openly express my doubt. Therefore we bowed, exchanging greetings as strangers, while, carefully watching, I saw how greatly the minds of both were relieved. They shot meaning glances at each other, and then, as though reassured that I was mystified and uncertain, the man who called himself Woodroffe explained to my companion------

"I've been over to Newton Stewart with Fred all day, and only got back a quarter of an hour ago. Aren't you playing any more to-day?"

"I think not," was her reply. "We've been out there the whole afternoon, and I'm rather tired. But they're still on the lawn. You can surely get a game with someone."

"If you don't play, I shan't. I returned to keep the promise I made this morning," he laughed, standing before the big open fireplace, holding his tennis racquet behind his back.

I examined his countenance, and was more than ever convinced that he was actually the man who gave me the name of Hornby and the false address in Somerset. The pair seemed to be on familiar terms, and I wondered whether they were engaged. In any case, the man seemed quite at home there.

As he chatted with the daughter of the house, he cast a quick, covert glance at me, and then darted a meaning look at her—a look of renewed confidence, as though he felt that he had successfully averted any suspicions I might have held.

We talked of the prospects of the grouse and the salmon, and from his remarks he seemed to be as keen at sport as he had once made out himself to be at yachting.

"My friend Leithcourt is awfully fortunate in getting such a splendid old place as this. On every hand I hear glowing accounts of the number of birds. The place has been well preserved in the past, and there's plenty of good cover."

"Yes," I said. "Gilrae, the owner, is a keen sportsman, and before he became so hard up he spent a lot of money on the estate, which, I believe, has always been considered one of the very best in the southwest. There's salmon, they say, down in the Glen yonder—but I've never tried for any."

"Certainly there is. I've seen several. I hope to try one of these days. The Glen is deep and shady—an ideal place for fish. The only disappointment here, as far as I can make out, is the very few head of black-game."

"Yes, but every year they are getting rarer and rarer in this part of Scotland. A really fine black-cock is quite an event nowadays," I said.

While we were talking, or rather while I was carefully watching the rapid working of his mind, Leithcourt himself entered and joined us. He had been playing tennis, and had come in to rest and cool.

Host and guest were evidently on the most intimate terms. Leithcourt addressed him as "Martin," and began to relate a quarrel which his head-gamekeeper had had that day with one of the small farmers on the estate regarding the killing of some rabbits. And while they were talking Muriel suggested that we should stroll down to the tennis-courts again, an invitation which, much as I regretted leaving the two men, I was bound to accept.

It seemed as though she wished purposely to take me away from that man's presence, fearing that by remaining there longer my suspicions might become confirmed. She was acting in conjunction with the man whom I had known as Hornby.

There were still a good many people watching the game, for it was pleasant in those old-world gardens in the sunset hour. The dried-up moat was now transformed into a garden filled with rhododendrons and bright azaleas, while the high ancient beech-hedges, the quaint old sundial with its motto: "Each time ye shadowe turneth ys one daye nearer unto dethe," and the old stone balustrades gray with lichen, all spoke mutely of those glorious days when the fierce horsemen of the Lairds of Rannoch were feared across the Border, and when many a prisoner of the Black Douglas had pined and died in those narrow stone chambers in the grim north tower that still stood high above.

Among the party strolling and lounging there prior to departure were quite a number of people I knew, people who had shooting-boxes in the vicinity and were my uncle's friends. In Scotland there is always a hearty hospitality among the sporting folk, and the laws of caste are far less rigorous than they are in England.

I was standing chatting with two ladies who were about to take leave of their hostess, when Leithcourt returned, but alone. Hornby had not accompanied him. Was it because he feared to again meet me?

In order to ascertain something regarding the man who had so mysteriously fled from Leghorn, I managed by the exercise of a little diplomacy to sit on the lawn with a young married woman named Tennant, wife of a cavalry captain, who was one of the house-party. After a little time I succeeded in turning the conversation to her fellow guests, and more particularly to the man I knew as Hornby.

"Oh! Mr. Woodroffe is most amusing," declared the bright little woman. "He's always playing some practical joke or other. After dinner he is usually the life and soul of our party."

"Yes," I said, "I like what little I have seen of him. He's a very good fellow, I should say. I've heard that he's engaged to Muriel," I hazarded. "Is that true?"

"Of course. They've been engaged nearly a year, but he's been abroad until quite lately. He is rather close about his own affairs, and never talks about his travels and adventures, although one day Mr. Leithcourt declared that his hairbreadth escapes would make a most exciting book if ever written."

"Leithcourt and he are evidently most intimate friends."

"Oh, quite inseparable!" she laughed. "And the other man who is always with them is that short, stout, red-faced old fellow standing over there with the lady in pale blue, Sir Ughtred Gardner. Mr. Woodroffe has nicknamed him 'Sir Putrid.'" And we both laughed. "Of course, don't say I said so," she whispered. "They don't call him that to his face, but it's so easy to make a mistake in his name when he's not within hearing. We women don't care for him, so the nickname just fits."

And she gossiped on, telling me much that I desired to know regarding the new tenant of Rannoch and his friends, and more especially of that man who had first introduced himself to me in the Consulate at Leghorn.

Half an hour later my uncle's carriage was announced, and I left with the distinct impression that there was some deep mystery surrounding the Leithcourts. What it was, however, I could not, for the life of me, make out. Perhaps it was Philip Leithcourt's intimate relation with the man who had so cleverly deceived me that incited my curiosity concerning him; perhaps it was that mysterious intuition, that curious presage of evil that sometimes comes to a man as warning of impending peril. Whatever the reason, I had become filled with grave apprehensions. The mystery grew deeper day by day, and was inexplicable.

During the week that followed I sought to learn all I could regarding the new people at the castle.

"They are taken up everywhere," declared my aunt when I questioned her. "Of course, we knew very little of them, except that they had a shoot up near Fort William two years ago, and that they have a town house in Green Street. They are evidently rather smart folks. Don't you think so?"

"Judging from their house-party, yes," I responded. "They are about as gay a crowd as one could find north of Carlisle just at present."

"Exactly. There are some well-known people among them, too," said my aunt. "I've asked them over to-morrow afternoon, and they've accepted."

"Excellent!" I exclaimed, for I wanted an opportunity for another chat with the dark-eyed girl who was engaged to the man whose alias was Hornby. I particularly desired to ascertain the reason of her fear when I had mentioned the Lola, and whether she possessed any knowledge of Hylton Chater.

The opportunity came to me in due course, for next afternoon the Rannoch party drove over in two large brakes, and with other people from the neighborhood and a band from Dumfries, my aunt's grounds presented a gay and animated scene. There was the usual tennis and croquet, while some of the men enjoyed a little putting on the excellent course my uncle, a golf enthusiast, had recently laid down.

As I expected, Woodroffe did not accompany the party. Mrs. Leithcourt, a slightly fussy little woman, apologized for his absence, explaining that he had been recalled to London suddenly a few days before, but was returning to Rannoch again at the end of the week.

"We couldn't afford to lose him," she declared to my aunt. "He is so awfully humorous—his droll sayings and antics keep us in a perfect roar each night at dinner. He's such a perfect mimic."

I turned away and strolled with Muriel, pleading an excuse to show her my uncle's beautiful grounds, not a whit less picturesque than those of the castle, and perhaps rather better kept.

"I only heard yesterday of your engagement, Miss Leithcourt," I remarked presently when we were alone. "Allow me to offer my best congratulations. When you introduced me to Mr. Woodroffe the other day I had no idea that he was to be your husband."

She glanced at me quickly, and I saw in her dark eyes a look of suspicion. Then she flushed slightly, and laughing uneasily said, in a blank, hard voice—

"It's very good of you, Mr. Gregg, to wish me all sorts of such pleasant things."