whispered the Greek as he turned up the light.

He took the paper under a bracket light on the other side of the room, beside the door of the winding stair, and began to read.

His face was a study, and Griggs watched it, wondering what was coming. As Logotheti read and reread the few short sentences, he was apparently seized by a fit of mirth which he struggled in vain to repress, and which soon broke out into uncontrollable laughter.

'The cleverest trick you ever saw!' he managed to get out between his paroxysms.

It was so well done that the detective was seriously embarra.s.sed; but after a moment's hesitation he judged that he ought to get his warrant back at all hazards, and he moved towards Logotheti with a menacing expression.

But the Greek, pretending to be afraid that the supposed lunatic was going to attack him, uttered an admirable yell of fear, opened the door close at his hand, rushed through, slammed it behind him, and fled up the dark stairs.

The detective lost no time, and followed in hot pursuit, his two companions tearing up after him into the darkness. Then Griggs quietly turned the key in the lock, for he was sure that Logotheti had reached the top in time to fasten the upper door, and must be already barricading it. Griggs proceeded to do the same, quietly and systematically, and the great strength he had not yet lost served him well, for the furniture in the room was heavy. In a couple of minutes it would have needed sledge-hammers and crowbars to break out by the lower entrance, even if the lock had not been a solid one.

Griggs then turned out the lights, and went quietly back through the library to the other part of the house to find Lady Maud.

Logotheti, having meanwhile made the upper door perfectly secure, descended by the open staircase to the hall, and sent the first footman he met to call the butler, with whom he said he wished to speak. The butler came at once.

'Lady Maud asked me to see those three men,' said Logotheti in a low tone. 'Mr. Griggs and I are convinced that they are lunatics escaped from the asylum, and we have locked them up securely in the staircase beyond the study.'

'Yes, sir,' said the butler, as if Logotheti had been explaining how he wished his shoe-leather to be treated.

'I think you had better telephone for the doctor, and explain everything to him over the wire without speaking to Lord Creedmore just yet.'

'Yes, sir.'

'How long will it take the doctor to get here?'

'Perhaps an hour, sir, if he's at home. Couldn't say precisely, sir.'

'Very good. There is no hurry; and of course her ladyship will be particularly anxious that none of her friends should guess what has happened; you see there would be a general panic if it were known that there are escaped lunatics in the house.'

'Yes, sir.'

'Perhaps you had better take a couple of men you can trust, and pile up some more furniture against the doors, above and below. One cannot be too much on the safe side in such cases.'

'Yes, sir. I'll do it at once, sir.'

Logotheti strolled back towards the gallery in a very unconcerned way.

As for the warrant, he had burnt it in the empty fireplace in Griggs'

room after making all secure, and had dusted down the black ashes so carefully that they had quite disappeared under the grate. After all, as the doctor would arrive in the firm expectation of finding three escaped madmen under lock and key, the Scotland Yard men might, have some difficulty in proving themselves sane until they could communicate with their headquarters, and by that time Mr. Van Torp could be far on his way if he chose.

When Logotheti reached the door of the drawing-room, Margaret was finishing Rosina's Cavatina from the _Barbiere di Siviglia_ in a perfect storm of fireworks, having transposed the whole piece two notes higher to suit her own voice, for it was originally written for a mezzo-soprano.

Lady Maud and Van Torp had gone out upon the terrace unnoticed a moment before Margaret had begun to sing. The evening was still and cloudless, and presently the purple twilight would pale under the summer moon, and the garden and the lawns would be once more as bright as day. The friends walked quickly, for Lady Maud set the pace and led Van Torp toward the trees, where the stables stood, quite hidden from the house. As soon as she reached the shade she stood still and spoke in a low voice.

'You have waited too long,' she said. 'Three men have come to arrest you, and their motor is over there in the avenue.'

'Where are they?' inquired the American, evidently not at all disturbed. 'I'll see them at once, please.'

'And give yourself up?'

'I don't care.'

'Here?'

'Why not? Do you suppose I am going to run away? A man who gets out in a hurry doesn't usually look innocent, does he?'

Lady Maud a.s.serted herself.

'You must think of me and of my father,' she said in a tone of authority Van Torp had never heard from her. 'I know you're as innocent as I am, but after all that has been said and written about you, and about you and me together, it's quite impossible that you should let yourself be arrested in our house, in the midst of a party that has been asked here expressly to be convinced that my father approves of you. Do you see that?'

'Well--' Mr. Van Torp hesitated, with his thumbs in his waistcoat pockets.

Across the lawn, from the open window, Margaret's voice rang out like a score of nightingales in unison.

'There's no time to discuss it,' Lady Maud said. 'I asked her to sing, so as to keep the people together. Before she has finished, you must be out of reach.'

Mr. Van Torp smiled. 'You're remarkably positive about it,' he said.

'You must get to town before the Scotland Yard people, and I don't know how much start they will give you. It depends on how long Mr.

Griggs and Logotheti can keep them in the old study. It will be neck and neck, I fancy. I'll go with you to the stables. You must ride to your own place as hard as you can, and go up to London in your car to-night. The roads are pretty clear on Sundays, and there's moonlight, so you will have no trouble. It will be easy to say here that you have been called away suddenly. Come, you must go!'

Lady Maud moved towards the stables, and Van Torp was obliged to follow her. Far away Margaret was singing the last bars of the waltz song.

'I must say,' observed Mr. Van Torp thoughtfully, as they walked on, 'for a lady who's generally what I call quite feminine, you make a man sit up pretty quick.'

'It's not exactly the time to choose for loafing,' answered Lady Maud.

'By the bye,' she added, 'you may as well know. Poor Leven is dead. I had a telegram a few minutes ago. He was killed yesterday by a bomb meant for somebody else.'

Van Torp stood still, and Lady Maud stopped with evident reluctance.

'And there are people who don't believe in Providence,' he said slowly. 'Well, I congratulate you anyway.'

'Hush, the poor man is dead. We needn't talk about him. Come, there's no time to lose!' She moved impatiently.

'So you're a widow!' Van Torp seemed to be making the remark to himself without expecting any answer, but it at once suggested a question. 'And now what do you propose to do?' he inquired. 'But I expect you'll be a nun, or something. I'd like you to arrange so that I can see you sometimes, will you?'

'I'm not going to disappear yet,' Lady Maud answered gravely.

They reached the stables, which occupied three sides of a square yard.

At that hour the two grooms and the stable-boy were at their supper, and the coachman had gone home to his cottage. A big brown retriever on a chain was sitting bolt upright beside his kennel, and began to thump the flagstones with his tail as soon as he recognised Lady Maud.

From within a fox-terrier barked two or three times. Lady Maud opened a door, and he sprang out at her yapping, but was quiet as soon as he knew her.

'You'd better take the Lancashire La.s.s,' she said to Van Torp. 'You're heavier than my father, but it's not far to ride, and she's a clever creature.'

She had turned up the electric light while speaking, for it was dark inside the stable; she got a bridle, went into the box herself, and slipped it over the mare's pretty head. Van Torp saw that it was useless to offer help.

'Don't bother about a saddle,' he said; 'it's a waste of time.'