It was one of the gala nights at Covent Garden Theatre, the first of the autumn season in this memorable year of grace 1792.  
The house was packed, both in the smart orchestra boxes and the pit, as well as in the more plebeian balconies and galleries above. Glück's Orpheus made a strong appeal to the more intellectual portions of the house, whilst the fashionable women, the gaily-dressed and brilliant throng, spoke to the eye of those who cared but little for this “latest importation from Germany.”
 
Selina Storace had been duly applauded after her grand aria by her numerous admirers; Benjamin Incledon, the acknowledged favourite of the ladies, had received special gracious recognition from the royal box; and now the curtain came down after the glorious finale to the second act, and the audience, which had hung spell-bound on the magic strains of the great maestro, seemed collectively to breathe a long sigh of satisfaction, previous to letting loose its hundreds of waggish and frivolous tongues.
 
In the smart orchestra boxes many well-known faces were to be seen. Mr. Pitt, overweighted with cares of state, was finding brief relaxation in to-night's musical treat; the Prince of Wales, jovial, rotund, somewhat coarse and commonplace in appearance, moved about from box to box, spending brief quarters of an hour with those of his more intimate friends.
 
In Lord Grenville's box, too, a curious, interesting personality attracted everyone's attention; a thin, small figure with shrewd, sarcastic face and deep-set eyes, attentive to the music, keenly critical of the audience, dressed in immaculate black, with dark hair free from any powder. Lord Grenville—Foreign Secretary of State—paid him marked, though frigid deference.
 
Here and there, dotted about among distinctly English types of beauty, one or two foreign faces stood out in marked contrast: the haughty aristocratic cast of countenance of the many French royalist émigrés who, persecuted by the relentless, revolutionary faction of their country, had found a peaceful refuge in England. On these faces sorrow and care were deeply writ; the women especially paid but little heed, either to the music or to the brilliant audience; no doubt their thoughts were far away with husband, brother, son maybe, still in peril, or lately succumbed to a cruel fate.
 
Among these the Comtesse de Tournay de Basserive, but lately arrived from France, was a most conspicuous figure: dressed in deep, heavy black silk, with only a white lace kerchief to relieve the aspect of mourning about her person, she sat beside Lady Portarles, who was vainly trying by witty sallies and somewhat broad jokes, to bring a smile to the Comtesse's sad mouth. Behind her sat little Suzanne and the Vicomte, both silent and somewhat shy among so many strangers. Suzanne's eyes seemed wistful; when she first entered the crowded house, she had looked eagerly all around, scanned every face, scrutinised every box. Evidently the one face she wished to see was not there, for she settled herself down quietly behind her mother, listened apathetically to the music, and took no further interest in the audience itself.
 
“Ah, Lord Grenville,” said Lady Portarles, as following a discreet knock, the clever, interesting head of the Secretary of State appeared in the doorway of the box, “you could not arrive more à propos. Here is Madame la Comtesse de Tournay positively dying to hear the latest news from France.”
 
The distinguished diplomatist had come forward and was shaking hands with the ladies.
 
“Alas!” he said sadly, “it is of the very worst. The massacres continue; Paris literally reeks with blood; and the guillotine claims a hundred victims a day.”
 
Pale and tearful, the Comtesse was leaning back in her chair, listening horror-struck to this brief and graphic account of what went on in her own misguided country.
 
“Ah, Monsieur!” she said in broken English, “it is dreadful to hear all that—and my poor husband still in that awful country. It is terrible for me to be sitting here, in a theatre, all safe and in peace, whilst he is in such peril.”
 
“Lud, Madame!” said honest, bluff Lady Portarles, “your sitting in a convent won't make your husband safe, and you have your children to consider: they are too young to be dosed with anxiety and premature mourning.”
 
The Comtesse smiled through her tears at the vehemence of her friend. Lady Portarles, whose voice and manner would not have misfitted a jockey, had a heart of gold, and hid the most genuine sympathy and most gentle kindliness, beneath the somewhat coarse manners affected by some ladies at that time.
 
“Besides which, Madame,” added Lord Grenville, “did you not tell me yesterday that the League of the Scarlet Pimpernel had pledged their honour to bring M. le Comte safely across the Channel?”
 
“Ah, yes!” replied the Comtesse, “and that is my only hope. I saw Lord Hastings yesterday . . . he reassured me again.”
 
“Then I am sure you need have no fear. What the league have sworn, that they surely will accomplish. Ah!” added the old diplomatist with a sigh, “if I were but a few years younger . . .”
 
“La, man!” interrupted honest Lady Portarles, “you are still young enough to turn your back on that French scarecrow that sits enthroned in your box to-night.”
 
“I wish I could . . . but your ladyship must remember that in serving our country we must put prejudices aside. M. Chauvelin is the accredited agent of his Government . . .”
 
“Odd's fish, man!” she retorted, “you don't call those bloodthirsty ruffians over there a government, do you?”
 
“It has not been thought advisable as yet,” said the Minister, guardedly, “for England to break off diplomatic relations with France, and we cannot therefore refuse to receive with courtesy the agent she wishes to send to us.”
 
“Diplomatic relations be demmed, my lord! That sly little fox over there is nothing but a spy, I'll warrant, and you'll find—an I'm much mistaken, that he'll concern himself little with diplomacy, beyond trying to do mischief to royalist refugees—to our heroic Scarlet Pimpernel and to the members of that brave little league.”
 
“I am sure,” said the Comtesse, pursing up her thin lips, “that if this Chauvelin wishes to do us mischief, he will find a faithful ally in Lady Blakeney.”
 
“Bless the woman!” ejaculated Lady Portarles, “did ever anyone see such perversity? My Lord Grenville, you have the gift of the gab, will you please explain to Madame la Comtesse that she is acting like a fool. In your position here in England, Madame,” she added, turning a wrathful and resolute face towards the Comtesse, “you cannot afford to put on the hoity-toity airs you French aristocrats are so fond of. Lady Blakeney may or may not be in sympathy with those ruffians in France; she may or may not have had anything to do with the arrest and condemnation of St. Cyr, or whatever the man's name is, but she is the leader of fashion in this country; Sir Percy Blakeney has more money than any half-dozen other men put together, he is hand and glove with royalty, and your trying to snub Lady Blakeney will not harm her, but will make you look a fool. Isn't that so, my lord?”
 
But what Lord Grenville thought of this matter, or to what reflections this homely tirade of Lady Portarles led the Comtesse de Tournay, remained unspoken, for the curtain had just risen on the third act of Orpheus, and admonishments to silence came from every part of the house.
 
Lord Grenville took a hasty farewell of the ladies and slipped back into his box, where M. Chauvelin had sat all through this entr'acte, with his eternal snuff-box in his hand, and with his keen pale eyes intently fixed upon a box opposite to him, where, with much frou-frou of silken skirts, much laughter and general stir of curiosity amongst the audience, Marguerite Blakeney had just entered, accompanied by her husband, and looking divinely pretty beneath the wealth of her golden, reddish curls, slightly besprinkled with powder, and tied back at the nape of her graceful neck with a gigantic black bow. Always dressed in the very latest vagary of fashion, Marguerite alone among the ladies that night had discarded the cross-over fichu and broad-lapelled over-dress, which had been in fashion for the last two or three years. She wore the short-waisted classical-shaped gown, which so soon was to become the approved mode in every country in Europe. It suited her graceful, regal figure to perfection, composed as it was of shimmering stuff which seemed a mass of rich gold embroidery.
 
As she entered, she leant for a moment out of the box, taking stock of all those present whom she knew. Many bowed to her as she did so, and from the royal box there came also a quick and gracious salute.
 
Chauvelin watched her intently all through the commencement of the third act, as she sat enthralled with the music, her exquisite little hand toying with a small jewelled fan, her regal head, her throat, arms and neck covered with magnificent diamonds and rare gems, the gift of the adoring husband who sprawled leisurely by her side.
 
Marguerite was passionately fond of music. Orpheus charmed her to-night. The very joy of living was writ plainly upon the sweet young face, it sparkled out of the merry blue eyes and lit up the smile that lurked around the lips. She was after all but five-and-twenty, in the heyday of youth, the darling of a brilliant throng, adored, fêted, petted, cherished. Two days ago the Day Dream had returned from Calais, bringing her news that her idolised brother had safely landed, that he thought of her, and would be prudent for her sake.
 
What wonder for the moment, and listening to Glück's impassioned strains, that she forgot her disillusionments, forgot her vanished love-dreams, forgot even the lazy, good-humoured nonentity who had made up for his lack of spiritual attainments by lavishing worldly advantages upon her.
 
He had stayed beside her in the box just as long as convention demanded, making way for His Royal Highness, and for the host of admirers who in a continued procession came to pay homage to the queen of fashion. Sir Percy had strolled away, to talk to more congenial friends probably. Marguerite did not even wonder whither he had gone—she cared so little; she had had a little court round her, composed of the jeunesse dorée of London, and had just dismissed them all, wishing to be alone with Glück for a brief while.
 
A discreet knock at the door roused her from her enjoyment.
 
“Come in,” she said with some impatience, without turning to look at the intruder.
 
Chauvelin, waiting for his opportunity, noted that she was alone, and now, without pausing for that impatient “Come in,” he quietly slipped into the box, and the next moment was standing behind Marguerite's chair.
 
“A word with you, citoyenne,” he said quietly.
 
Marguerite turned quickly, in alarm, which was not altogether feigned.
 
“Lud, man! you frightened me,” she said with a forced little laugh, “your presence is entirely inopportune. I want to listen to Glück, and have no mind for talking.”
 
“But this is my only opportunity,” he said, as quietly, and without waiting for permission, he drew a chair close behind her—so close that he could whisper in her ear, without disturbing the audience, and without being seen, in the dark background of the box. “This is my only opportunity,” he repeated, as she vouchsafed him no reply, “Lady Blakeney is always so surrounded, so fêted by her court, that a mere old friend has but very little chance.”
 
“Faith, man!” she said impatiently, “you must seek for another opportunity then. I am going to Lord Grenville's ball to-night after the opera. So are you, probably. I'll give you five minutes then. . . .”
 
“Three minutes in the privacy of this box are quite sufficient for me,”
 he rejoined placidly, “and I think that you would be wise to listen to
me, Citoyenne St. Just.”
Marguerite instinctively shivered. Chauvelin had not raised his voice above a whisper; he was now quietly taking a pinch of snuff, yet there was something in his attitude, something in those pale, foxy eyes, which seemed to freeze the blood in her veins, as would the sight of some deadly hitherto unguessed peril.
 
“Is that a threat, citoyen?” she asked at last.
 
“Nay, fair lady,” he said gallantly, “only an arrow shot into the air.”
 
He paused a moment, like a cat which sees a mouse running heedlessly by, ready to spring, yet waiting with that feline sense of enjoyment of mischief about to be done. Then he said quietly—
 
“Your brother, St. Just, is in peril.”
 
Not a muscle moved in the beautiful face before him. He could only see it in profile, for Marguerite seemed to be watching the stage intently, but Chauvelin was a keen observer; he noticed the sudden rigidity of the eyes, the hardening of the mouth, the sharp, almost paralysed tension of the beautiful, graceful figure.
 
“Lud, then,” she said, with affected merriment, “since 'tis one of your imaginary plots, you'd best go back to your own seat and leave me to enjoy the music.”
 
And with her hand she began to beat time nervously against the cushion of the box. Selina Storace was singing the “Che farò” to an audience that hung spellbound upon the prima donna's lips. Chauvelin did not move from his seat; he quietly watched that tiny nervous hand, the only indication that his shaft had indeed struck home.
 
“Well?” she said suddenly and irrelevantly, and with the same feigned unconcern.
 
“Well, citoyenne?” he rejoined placidly.
 
“About my brother?”
 
“I have news of him for you which, I think, will interest you, but first let me explain. . . . May I?”
 
The question was unnecessary. He felt, though Marguerite still held her head steadily averted from him, that her every nerve was strained to hear what he had to say.
 
“The other day, citoyenne,” he said, “I asked for your help. . . . France needed it, and I thought I could rely on you, but you gave me your answer. . . . Since then the exigencies of my own affairs and your own social duties have kept us apart . . . although many things have happened. . . .”
 
“To the point, I pray you, citoyen,” she said lightly; “the music is entrancing, and the audience will get impatient of your t............