‘He must on no account be moved,’ said the dark little Belgian doctor, whose eyes seemed to peer so quizzically through his spectacles; and he said it with much positiveness.

That pronouncement rather settled their plans for them.  It was certainly a professional triumph for Nella, who, previous to the doctor’s arrival, had told them the very same thing.  Considerable argument had passed before the doctor was sent for.  Prince Aribert was for keeping the whole affair a deep secret among their three selves.  Theodore Racksole agreed so far, but he suggested further that at no matter what risk they should transport the patient over to England at once.  Racksole had an idea that he should feel safer in that hotel of his, and better able to deal with any situation that might arise.  Nella scorned the idea.  In her quality of an amateur nurse, she assured them that Prince Eugen was much more seriously ill than either of them suspected, and she urged that they should take absolute possession of the house, and keep possession till Prince Eugen was convalescent.

‘But what about the Spencer female?’ Racksole had said.

’Keep her where she is.  Keep her a prisoner.  And hold the house against all comers.  If Jules should come back, simply defy him to enter ­that is all.

There are two of you, so you must keep an eye on the former occupiers, if they return, and on Miss Spencer, while I nurse the patient.  But first, you must send for a doctor.’

‘Doctor!’ Prince Aribert had said, alarmed.  ’Will it not be necessary to make some awkward explanation to the doctor?’

‘Not at all!’ she replied.  ’Why should it be?  In a place like Ostend doctors are far too discreet to ask questions; they see too much to retain their curiosity.  Besides, do you want your nephew to die?’

Both the men were somewhat taken aback by the girl’s sagacious grasp of the situation, and it came about that they began to obey her like subordinates.

She told her father to sally forth in search of a doctor, and he went.  She gave Prince Aribert certain other orders, and he promptly executed them.

By the evening of the following day, everything was going smoothly.  The doctor came and departed several times, and sent medicine, and seemed fairly optimistic as to the issue of the illness.  An old woman had been induced to come in and cook and clean.  Miss Spencer was kept out of sight on the attic floor, pending some decision as to what to do with her.  And no one outside the house had asked any questions.  The inhabitants of that particular street must have been accustomed to strange behaviour on the part of their neighbours, unaccountable appearances and disappearances, strange flittings and arrivals.  This strong-minded and active trio ­Racksole, Nella, and Prince Aribert ­might have been the lawful and accustomed tenants of the house, for any outward evidence to the contrary.

On the afternoon of the third day Prince Eugen was distinctly and seriously worse.  Nella had sat up with him the previous night and throughout the day.

Her father had spent the morning at the hotel, and Prince Aribert had kept watch.  The two men were never absent from the house at the same time, and one of them always did duty as sentinel at night.  On this afternoon Prince Aribert and Nella sat together in the patient’s bedroom.  The doctor had just left.  Theodore Racksole was downstairs reading the New York Herald.  The Prince and Nella were near the window, which looked on to the back-garden.

It was a queer shabby little bedroom to shelter the august body of a European personage like Prince Eugen of Posen.  Curiously enough, both Nella and her father, ardent democrats though they were, had been somehow impressed by the royalty and importance of the fever-stricken Prince ­impressed as they had never been by Aribert.  They had both felt that here, under their care, was a species of individuality quite new to them, and different from anything they had previously encountered.  Even the gestures and tones of his delirium had an air of abrupt yet condescending command ­an imposing mixture of suavity and haughtiness.  As for Nella, she had been first struck by the beautiful ‘E’ over a crown on the sleeves of his linen, and by the signet ring on his pale, emaciated hand.  After all, these trifling outward signs are at least as effective as others of deeper but less obtrusive significance.  The Racksoles, too, duly marked the attitude of Prince Aribert to his nephew:  it was at once paternal and reverential; it disclosed clearly that Prince Aribert continued, in spite of everything, to regard his nephew as his sovereign lord and master, as a being surrounded by a natural and inevitable pomp and awe.  This attitude, at the beginning, seemed false and unreal to the Americans; it seemed to them to be assumed; but gradually they came to perceive that they were mistaken, and that though America might have cast out ’the monarchial superstition’, nevertheless that ‘superstition’ had vigorously survived in another part of the world.

‘You and Mr Racksole have been extraordinarily kind to me,’ said Prince Aribert very quietly, after the two had sat some time in silence.

‘Why?  How?’ she asked unaffectedly.  ’We are interested in this affair ourselves, you know.  It began at our hotel ­you mustn’t forget that, Prince.’

‘I don’t,’ he said.  ’I forget nothing.  But I cannot help feeling that I have led you into a strange entanglement.  Why should you and Mr Racksole be here ­you who are supposed to be on a holiday! ­hiding in a strange house in a foreign country, subject to all sorts of annoyances and all sorts of risks, simply because I am anxious to avoid scandal, to avoid any sort of talk, in connection with my misguided nephew?  It is nothing to you that the Hereditary Prince of Posen should be liable to a public disgrace.  What will it matter to you if the throne of Posen becomes the laughing-stock of Europe?’

‘I really don’t know, Prince,’ Nella smiled roguishly.  ’But we Americans have, a habit of going right through with anything we have begun.’

‘Ah!’ he said, ’who knows how this thing will end?  All our trouble, our anxieties, our watchfulness, may come to nothing.  I tell you that when I see Eugen lying there, and think that we cannot learn his story until he recovers, I am ready to go mad.  We might be arranging things, making matters smooth, preparing for the future, if only we knew ­knew what he can tell us.  I tell you that I am ready to go mad.  If anything should happen to you, Miss Racksole, I would kill myself.’

‘But why?’ she questioned.  ’Supposing, that is, that anything could happen to me ­which it can’t.’

‘Because I have dragged you into this,’ he replied, gazing at her.  ’It is nothing to you.  You are only being kind.’

‘How do you know it is nothing to me, Prince?’ she asked him quickly.

Just then the sick man made a convulsive movement, and Nella flew to the bed and soothed him.  From the head of the bed she looked over at Prince Aribert, and he returned her bright, excited glance.  She was in her travelling-frock, with a large white Belgian apron tied over it.  Large dark circles of fatigue and sleeplessness surrounded her eyes, and to the Prince her cheek seemed hollow and thin; her hair lay thick over the temples, half covering the ears.  Aribert gave no answer to her query ­merely gazed at her with melancholy intensity.

‘I think I will go and rest,’ she said at last.  ’You will know all about the medicine.’

‘Sleep well,’ he said, as he softly opened the door for her.  And then he was alone with Eugen.  It was his turn that night to watch, for they still half-expected some strange, sudden visit, or onslaught, or move of one kind or another from Jules.  Racksole slept in the parlour on the ground floor.

Nella had the front bedroom on the first floor; Miss Spencer was immured in the attic; the last-named lady had been singularly quiet and incurious, taking her food from Nella and asking no questions, the old woman went at nights to her own abode in the purlieus of the harbour.  Hour after hour Aribert sat silent by his nephew’s bed-side, attending mechanically to his wants, and every now and then gazing hard into the vacant, anguished face, as if trying to extort from that mask the secrets which it held.  Aribert was tortured by the idea that if he could have only half an hour’s, only a quarter of an hour’s, rational speech with Prince Eugen, all might be cleared up and put right, and by the fact that that rational talk was absolutely impossible on Eugen’s part until the fever had run its course.  As the minutes crept on to midnight the watcher, made nervous by the intense, electrical atmosphere which seems always to surround a person who is dangerously ill, grew more and more a prey to vague and terrible apprehensions.  His mind dwelt hysterically on the most fatal possibilities.

He wondered what would occur if by any ill-chance Eugen should die in that bed ­how he would explain the affair to Posen and to the Emperor, how he would justify himself.  He saw himself being tried for murder, sentenced (him ­a Prince of the blood!), led to the scaffold... a scene unparalleled in Europe for over a century! ...  Then he gazed anew at the sick man, and thought he saw death in every drawn feature of that agonized face.  He could have screamed aloud.  His ears heard a peculiar resonant boom.  He started ­it was nothing but the city clock striking twelve.  But there was another sound ­a mysterious shuffle at the door.  He listened; then jumped from his chair.  Nothing now!  Nothing!  But still he felt drawn to the door, and after what seemed an interminable interval he went and opened it, his heart beating furiously.  Nella lay in a heap on the door mat.  She was fully dressed, but had apparently lost consciousness.  He clutched at her slender body, picked her up, carried her to the chair by the fire-place, and laid her in it.  He had forgotten all about Eugen.

‘What is it, my angel?’ he whispered, and then he kissed her ­kissed her twice.  He could only look at her; he did not know what to do to succour her.

At last she opened her eyes and sighed.

‘Where am I?’ she asked vaguely, in a tremulous tone as she recognized him.  ‘Is it you?  Did I do anything silly?  Did I faint?’

‘What has happened?  Were you ill?’ he questioned anxiously.  He was kneeling at her feet, holding her hand tight.

‘I saw Jules by the side of my bed,’ she murmured; ’I’m sure I saw him; he laughed at me.  I had not undressed.  I sprang up, frightened, but he had gone, and then I ran downstairs ­to you.’

‘You were dreaming,’ he soothed her.

‘Was I?’

’You must have been.  I have not heard a sound.  No one could have entered.

But if you like I will wake Mr Racksole.’

‘Perhaps I was dreaming,’ she admitted.  ‘How foolish!’

‘You were over-tired,’ he said, still unconsciously holding her hand.  They gazed at each other.  She smiled at him.

‘You kissed me,’ she said suddenly, and he blushed red and stood up before her.  ‘Why did you kiss me?’

‘Ah!  Miss Racksole,’ he murmured, hurrying the words out.  ’Forgive me.  It is unforgivable, but forgive me.  I was overpowered by my feelings.  I did not know what I was doing.’

‘Why did you kiss me?’ she repeated.

‘Because ­Nella!  I love you.  I have no right to say it.’

‘Why have you no right to say it?’

‘If Eugen dies, I shall owe a duty to Posen ­I shall be its ruler.’

‘Well!’ she said calmly, with an adorable confidence.  ’Papa is worth forty millions.  Would you not abdicate?’

‘Ah!’ he gave a low cry.  ’Will you force me to say these things?  I could not shirk my duty to Posen, and the reigning Prince of Posen can only marry a Princess.’

‘But Prince Eugen will live,’ she said positively, ‘and if he lives ­’

’Then I shall be free.  I would renounce all my rights to make you mine, if ­if ­’

‘If what, Prince?’

‘If you would deign to accept my hand.’

‘Am I, then, rich enough?’

‘Nella!’ He bent down to her.

Then there was a crash of breaking glass.  Aribert went to the window and opened it.  In the starlit gloom he could see that a ladder had been raised against the back of the house.  He thought he heard footsteps at the end of the garden.

‘It was Jules,’ he exclaimed to Nella, and without another word rushed upstairs to the attic.  The attic was empty.  Miss Spencer had mysteriously vanished.