His hold did not relax.  “My dear,” he said, “you talk like a hysterical child!  Lie down at once, and don’t be ridiculous!”

She wavered perceptibly before his insistence.  “If I do, Scott must give me a draught.  I can’t do without it—­indeed—­indeed!”

“You are going to do without it to-night,” Eustace said, with cool decision.  “Scott is worn out and has gone to bed.  I made him promise to stay there unless he was rung for.  And he will not be rung for to-night.”

Isabel made a sharp movement of dismay.  “But—­but—­I always have the draught sooner or later.  I must have it.  Eustace, I must!  I can’t do without it!  I never have done without it!”

Eustace’s face did not alter.  It looked as if it were hewn in granite.  “You are going to make a beginning to-night,” he said.  “You have been poisoned by that stuff long enough, and I am going to put a stop to it.  Now get into bed, and be reasonable!  Biddy, you clear out and do the same!  You can leave the door ajar if you like.  I’ll call you if you are wanted.”

He pointed to the half-open door that led into the small adjoining room in which Biddy slept.  The old woman stood and stared at him with consternation in her beady eyes.

“Is it meself that could do such a thing?” she protested.  “I never leave my young lady till she’s asleep, Sir Eustace.  I’d sooner come under the curse of the Almighty.”

He raised his brows momentarily, but he kept his hand upon his sister.  He was steadily pressing her towards the bed.  “If you don’t do as you are told, Biddy, you will be made,” he observed.  “I am here to-night for a definite purpose, and I am not going to be thwarted by you.  So you had better take yourself out of my way.  Now, Isabel, you know me, don’t you?  You know it is useless to fight against me when my mind is made up.  Be sensible for once!  It’s for your own good.  You can’t have that draught.  You have got to manage without it.”

“Oh, I can’t!  I can’t!” moaned Isabel.  She was striving to resist his hold, but her efforts were piteously weak.  The force of his personality plainly dominated her.  “I shall lie awake all night—­all night.”

“Very well,” he said inexorably.  “You must.  Sleep will come sooner or later, and then you can make up for it.”

“Oh, but you don’t understand.”  Piteously she turned and clasped his arm in desperate entreaty.  “I shall lie awake in torture.  I shall hear him calling all night long.  He is there beyond the mountains, wanting me.  And I can’t get to him.  It is agony—­oh, it is agony—­to lie and listen!”

He took her between his hands, very firmly, very quietly.  “Isabel, you are talking nonsense—­utter nonsense!  And I refuse to listen to it.  Get into bed!  Do you hear?  Yes, I insist.  I am capable of putting you there.  If you mean to behave like a child, I shall treat you as one.  Now for the last time, get into bed.”