It was midnight when Nevill's car ran into the beautiful oasis town, guarded by the most curious mountains of the Algerian desert, and they were at their strangest, cut out clear as the painted mountains of stage scenery, in the light of the great acetylene lamps. Stephen thought them like a vast, half-burned Moorish city of mosques and palaces, over which sand-storms had raged for centuries, leaving only traces here and there of a ruined tower, a domed roof, or an ornamental frieze.

Of the palms he could see nothing, except the long, dark shape of the oasis among the pale sand-billows; but early next morning he and Nevill were up and out on the roof of the little French hotel, while sunrise banners marched across the sky. Stephen had not known that desert dunes could be bright peach-pink, or that a river flowing over white stones could look like melted rubies, or that a few laughing Arab girls, ankle-deep in limpid water, could glitter in morning light like jewelled houris in celestial gardens. But now that he knew, he would never forget his first desert picture.

The two men stood on the roof among the bubbly domes for a long time, looking over the umber-coloured town and the flowing oasis which swept to Bou-Saada's brown feet like a tidal wave. It was not yet time to go and ask questions of the CaÏd, whom Nevill knew.

Stephen was advised not to drink coffee in the hotel before starting on their quest. "We shall have to swallow at least three cups each of cafÉ maure at the CaÏd's house, and perhaps a dash of tea flavoured with mint, on top of all, if we don't want to begin by hurting our host's feelings," Nevill said. So they fasted, and fed their minds by walking through Bou-Saada in its first morning glory. Already the old part of the town was alive, for Arabs love the day when it is young, even as they love a young girl for a bride.

The Englishmen strolled into the cool, dark mosque, where heavy Eastern scents of musk and benzoin had lain all night like fugitives in sanctuary, and where the roof was held up by cypress poles instead of marble pillars, as in the grand mosques of big cities. By the time they were ready to leave, dawn had become daylight, and coming out of the brown dusk, the town seemed flooded with golden wine, wonderful, bubbling, unbelievable gold, with scarlet and purple and green figures floating in it, brilliant as rainbow fish.

The CaÏd lived near the old town, in an adobe house, with a garden which was a tangle of roses and pomegranate blossoms, under orange trees and palms. And there were narrow paths of hard sand, the colour of old gold, which rounded up to the centre, and had little runnels of water on either side. The sunshine dripped between the long fingers of the palm leaves, to trail in a lacy pattern along the yellow paths, and the sound of the running water was sweet.

It was in this garden that the CaÏd gave his guests the three cups of coffee each, followed by the mint-flavoured tea which Nevill had prophesied. And when they had admired a tame gazelle which nibbled cakes of almond and honey from their hands, the CaÏd insisted on presenting it to his good friend, Monsieur Caird.

Over the cups of cafÉ maure, they talked of Captain Cassim ben Halim, but their host could or would tell them nothing beyond the fact that Ben Halim had once lived for a little while not far from Bou-Saada. He had inherited from his father a country house, about fifty kilometres distant, but he had never stayed there until after retiring from the army, and selling his place in Algiers. Then he had spent a few months in the country. The CaÏd had met him long ago in Algiers, but had not seen him since. Ben Halim had been ill, and had led a retired life in the country, receiving no one. Afterward he had gone away, out of Algeria. It was said that he had died abroad a little later. Of that, the CaÏd was not certain; but in any case the house on the hill was now in the possession of the CaÏd of Ain Dehdra, Sidi ElaÏd ben Sliman, a distant cousin of Ben Halim, said to be his only living relative.

Then their host went on to describe the house with the white wall, which looked down upon a cemetery and a village. His description was almost precisely what Mouni's had been, and there was no doubt that the place where she had lived with the beautiful lady was the place of which he spoke. But of the lady herself they could learn nothing. The CaÏd had no information to give concerning Ben Halim's family.

He pressed them to stay, and see all the beauties of the oasis. He would introduce them to the marabout at El Hamel, and in the evening they should see a special dance of the Ouled NaÏls. But they made excuses that they must get on, and bade the CaÏd good-bye after an hour's talk. As for the gazelle approvoisÉe, Nevill named her Josette, and hired an Arab to take her to Algiers by the diligence, with explicit instructions as to food and milk.

Swarms of locusts flew into their faces, and fell into the car, or were burned to death in the radiator, as they sped along the road towards the white house on the golden hill. They started from Bou-Saada at ten o'clock, and though the road was far from good, and they were not always sure of the way, the noon heat was scarcely at its height when Stephen said: "There it is! That must be the hill and the white wall with the towers."

"Yes, there's the cemetery too," answered Nevill. "We're seeing it on our left side, as we go, I hope that doesn't mean we're in for bad luck."

"Rot!" said Stephen, promptly. Yet for all his scorn of Nevill's grotesque superstitions, he was not in a confident mood. He did not expect much good from this visit to Ben Halim's old country house. And the worst was, that here seemed their last chance of finding out what had become of Saidee Ray, if not of her sister.

The sound of the motor made a brown face flash over the top of the tall gate, like a Jack popping out of his box.

"La Sidi, el CaÏd?" asked Nevill. "Is he at home?"

The face pretended not to understand; and having taken in every detail of the strangers' appearance and belongings, including the motor-car, it disappeared.

"What's going to happen now?" Stephen wanted to know.

Nevill looked puzzled. "The creature isn't too polite. Probably it's afraid of Roumis, and has never been spoken to by one before. But I hope it will promptly scuttle indoors and fetch its master, or some one with brains and manners."

Several minutes passed, and the yellow motor-car continued to advertise its presence outside the CaÏd's gate by panting strenuously. The face did not show itself again; and there was no evidence of life behind the white wall, except the peculiarly ominous yelping of Kabyle dogs.

"Let's pound on the gate, and show them we mean to get in," said Stephen, angry-eyed.

But Nevill counselled waiting. "Never be in a hurry when you have to do with Arabs. It's patience that pays."

"Here come two chaps on horseback," Stephen said, looking down at the desert track that trailed near the distant cluster of mud houses, which were like square blocks of gold in the fierce sunshine. "They seem to be staring up at the car. I wonder if they're on their way here!"

"It may be the CaÏd, riding home with a friend, or a servant," Nevill suggested. "If so, I'll bet my hat there are other eyes than ours watching for him, peering out through some spy-hole in one of the gate-towers."

His guess was right. It was the CaÏd coming home, and MaÏeddine was with him; for Lella M'Barka had been obliged to rest for three days at the farmhouse on the hill, and the CaÏd's guest had accompanied him before sunrise this morning to see a favourite white mehari, or racing camel, belonging to Sidi ElaÏd ben Sliman, which was very ill, in care of a wise man of the village. Now the mehari was dead, and as MaÏeddine seemed impatient to get back, they were riding home, in spite of the noon heat.

MaÏeddine had left the house reluctantly this morning. Not that he could often see Victoria, who was nursing M'Barka, and looking so wistful that he guessed she had half hoped to find her sister waiting behind the white wall on the golden hill.

Though he could expect little of the girl's society, and there was little reason to fear that harm would come to her, or that she would steal away in his absence, still he had hated to ride out of the gate and leave her. If the CaÏd had not made a point of his coming, he would gladly have stayed behind. Now, when he looked up and saw a yellow motor-car at the gate, he believed that his feeling had been a presentiment, a warning of evil, which he ought so have heeded.

He and the CaÏd were a long way off when he caught sight of the car, and heard its pantings, carried by the clear desert air. He could not be certain of its identity, but he prided himself upon his keen sight and hearing, and where they failed, instinct stepped in. He was sure that it was the car which had waited for Stephen Knight when the Charles Quex came in, the car of Nevill Caird, about whom he had made inquiries before leaving Algiers. MaÏeddine knew, of course, that Victoria had been to the Djenan el Djouad, and he was intensely suspicious as well as jealous of Knight, because of the letter Victoria had written. He knew also that the two Englishmen had been asking questions at the Hotel de la Kasbah; and he was not surprised to see the yellow car in front of the CaÏd's gates. Now that he saw it, he felt dully that he had always known it would follow him.

If only he had been in the house, it would not have mattered. He would have been able to prevent Knight and Caird from seeing Victoria, or even from having the slightest suspicion that she was, or had been, there. It was the worst of luck that he should be outside the gates, for now he could not go back while the Englishmen were there. Knight would certainly recognize him, and guess everything that he did not know.

MaÏeddine thought very quickly. He dared not ride on, lest the men in the car should have a field-glass. The only thing was to let Ben Sliman go alone, so that, if eyes up there on the hill were watching, it might seem that the CaÏd was parting from some friend who lived in the village. He would have to trust ElaÏd's discretion and tact, as he knew already he might trust his loyalty. Only—the situation was desperate. Tact, and an instinct for the right word, the frank look, were worth even more than loyalty at this moment. And one never quite knew how far to trust another man's judgment. Besides, the mischief might have been done before Ben Sliman could arrive on the scene; and at the thought of what might happen, MaÏeddine's heart seemed to turn in his breast. He had never known a sensation so painful to body and mind, and it was hideous to feel helpless, to know that he could do only harm, and not good, by riding up the hill. Nevertheless, he said to himself, if he should see Victoria come out to speak with these men, he would go. He would perhaps kill them, and the chauffeur too. Anything rather than give up the girl now; for the sharp stab of the thought that he might lose her, that Stephen Knight might have her, made him ten times more in love than he had been before. He wished that Allah might strike the men in the yellow car dead; although, ardent Mussulman as he was, he had no hope that such a glorious miracle would happen.

"It is those men from Algiers of whom I told thee," he said to the CaÏd. "I must stop below. They must not recognize me, or the dark one who was on the ship, will guess. Possibly he suspects already that I stand for something in this affair."

"Who can have sent them to my house?" Ben Sliman wondered. The two drew in their horses and put on the manner of men about to bid each other good-bye.

"I hope, I am almost sure, that they know nothing of her, or of me. Probably, when inquiring about Ben Halim, in order to hear of her sister, and so find out where she has gone, they learned only that Ben Halim once lived here. If thy servants are discreet, it may be that no harm will come from this visit."

"They will be discreet. Have no fear," the CaÏd assured him. Yet it was on his tongue to say; "the lady herself, when she hears the sound of the car, may do some unwise thing." But he did not finish the sentence. Even though the young girl—whom he had not seen—was a Roumia, obsessed with horrible, modern ideas, which at present it would be dangerous to try and correct, he could not discuss her with MaÏeddine. If she showed herself to the men, it could not be helped. What was to be, would be. MektÛb!

"Far be it from me to distrust my friend's servants," said MaÏeddine; "but if in their zeal they go too far and give an impression of something to hide, it would be as bad as if they let drop a word too many."

"I will ride on and break any such impression if it has been made," Ben Sliman consoled him. "Trust me. I will be as gracious to these Roumis as if they were true believers."

"I do trust thee completely," answered the younger man. "While they are at thy gates, or within them, I must wait with patience. I cannot remain here in the open—yet I wish to be within sight, that I may see with my own eyes all that happens. What if I ride to one of the black tents, and ask for water to wash the mouth of my horse? If they have it not, it is no matter."

"Thine is a good thought," said Ben Sliman, and rode on, putting his slim white Arab horse to a trot.

To the left from the group of adobe houses, and at about the same distance from the rough track on which they had been riding, was a cluster of nomad tents, like giant bats with torpid wings spread out ink-black on the gold of the desert. A little farther off was another small encampment of a different tribe; and their tents were brown, striped with black and yellow. They looked like huge butterflies resting. But MaÏeddine thought of no such similes. He was a child of the Sahara, and used to the tents and the tent-dwellers. His own father, the Agha, lived half the year in a great tent, when he was with his douar, and MaÏeddine had been born under the roof of camel's hair. His own people and these people were not kin, and their lives lay far apart; yet a man of one nomad tribe understands all nomads, though he be a chief's son, and they as poor as their own ill-fed camels. His pride was his nomad blood, for all men of the Sahara, be they princes or camel-drivers, look with scorn upon the sedentary people, those of the great plain of the Tell, and fat eaters of ripe dates in the cities.

The eight or ten black tents were gathered round one, a little higher, a little less ragged than the others—the tent of the Kebir, or headman; but it was humble enough. There would have been room and to spare for a dozen such under the tente sultane of the Agha, at his douar south of El Aghouat.

As MaÏeddine rode up, a buzz of excitement rose in the hive. Some one ran to tell the Kebir that a great Sidi was arriving, and the headman came out from his tent, where he had been meditating or dozing after the chanting of the midday prayer—the prayer of noon.

He was a thin, elderly man, with an eagle eye to awe his women-folk, and an old burnous of sheep's wool, which was of a deep cream colour because it had not been washed for many years. Yet he smelt good, with a smell that was like the desert, and there was no foul odour in the miniature douar, as in European dwellings of the very poor. There is never a smell of uncleanliness about Arabs, even those people who must perform most of the ablutions prescribed by their religion with sand instead of water. But the Saharian saying is that the desert purifies all things.

The Kebir was polite though not servile to MaÏeddine, and while the horse borrowed from the CaÏd was having its face economically sprinkled with water from a brown goat-skin, black coffee was being hospitably prepared for the guest by the women of the household, unveiled of course, as are all women of the nomad tribes, except those of highest birth.

MaÏeddine did not want the coffee, but it would have been an insult to refuse, and he made laboured conversation with the Kebir, his eyes and thoughts fixed on the CaÏd's gate and the yellow motor-car. He hardly saw the tents, beneath whose low-spread black wings eyes looked out at him, as the bright eyes of chickens look out from under the mother-hen's feathers. They were all much alike, though the Kebir's, as befitted his position, was the best, made of wide strips of black woollen material stitched together, spread tightly over stout poles, and pegged down into the hard sand. There was a partition dividing the tent in two, a partition made of one or two old haÏcks, woven by hand, and if MaÏeddine had been interested, he could have seen his host's bedding arranged for the day; a few coarse rugs and frechias piled up carelessly, out of the way. There was a bale of camels' hair, ready for weaving, and on top of it a little boy was curled up asleep. From the tent-poles hung an animal's skin, drying, and a cradle of netted cords in which swung and slept a swaddled baby no bigger than a doll. It was a girl, therefore its eyes were blackened with kohl, and its eyebrows neatly sketched on with paint, as they had been since the unfortunate day of its birth, when the father grumbled because it was not a "child," but only a worthless female.

The mother of the four weeks' old doll, a fine young woman tinkling with Arab silver, left her carpet-weaving to grind the coffee, while her withered mother-in-law brightened with brushwood the smouldering fire of camel-dung. The women worked silently, humbly, though they would have been chattering if the great Sidi stranger had not been there; but two or three little children in orange and scarlet rags played giggling among the rubbish outside the tent—a broken bassour-frame, or palanquin, waiting to be mended; date boxes, baskets, and wooden plates; old kous-kous bowls, bundles of alfa grass, chicken feathers, and an infant goat with its mother.

The sound of children's shrill laughter, which passed unnoticed by the parents, who had it always in their ears, rasped MaÏeddine's nerves, and he would have liked to strike or kick the babies into silence. Most Arabs worship children, even girls, and are invariably kind to them, but to-day MaÏeddine hated anything that ran about disturbingly and made a noise.

Now the CaÏd had reached the gate, and was talking to the men in the motor-car. Would he send them away? No, the gate was being opened by a servant. Ben Sliman must have invited the Roumis in. Possibly it was a wise thing to do, yet how dangerous, how terribly dangerous, with Victoria perhaps peeping from one of the tiny windows at the women's corner of the house, which looked on the court! They could not see her there, but she could see them, and if she were tired of travelling and dancing attendance on a fidgety invalid—if she repented her promise to keep the secret of this journey?

MaÏeddine's experience of women inclined him to think that they always did forget their promises to a man the moment his back was turned. Victoria was different from the women of his race, or those he had met in Paris, yet she was, after all, a woman; and there was no truer saying than that you might more easily prophesy the direction of the wind than say what a woman was likely to do. The coffee which the Kebir handed him made him feel sick, as if he had had a touch of the sun. What was happening up there on the hill, behind the gates which stood half open? What would she do—his Rose of the West?