The doctor shook his head.

“We’ve not heard from her, as it happens.  I understood she was to remain with Miss Vandemeyer for a while.  But what can have happened?  Surely the girl has not been kidnapped.”

“That remains to be seen,” said Sir James gravely.

The other hesitated.

“You do not think I ought to go to the police?”

“No, no.  In all probability the young lady is with other relations.”

The doctor was not completely satisfied, but he saw that Sir James was determined to say no more, and realized that to try and extract more information from the famous K.C. would be mere waste of labour.  Accordingly, he wished them goodbye, and they left the hotel.  For a few minutes they stood by the car talking.

“How maddening,” cried Tuppence.  “To think that Julius must have been actually under the same roof with her for a few hours.”

“I was a darned idiot,” muttered Julius gloomily.

“You couldn’t know,” Tuppence consoled him.  “Could he?” She appealed to Sir James.

“I should advise you not to worry,” said the latter kindly.  “No use crying over spilt milk, you know.”

“The great thing is what to do next,” added Tuppence the practical.

Sir James shrugged his shoulders.

“You might advertise for the nurse who accompanied the girl.  That is the only course I can suggest, and I must confess I do not hope for much result.  Otherwise there is nothing to be done.”

“Nothing?” said Tuppence blankly.  “And—­Tommy?”

“We must hope for the best,” said Sir James.  “Oh yes, we must go on hoping.”

But over her downcast head his eyes met Julius’s, and almost imperceptibly he shook his head.  Julius understood.  The lawyer considered the case hopeless.  The young American’s face grew grave.  Sir James took Tuppence’s hand.

“You must let me know if anything further comes to light.  Letters will always be forwarded.”

Tuppence stared at him blankly.

“You are going away?”

“I told you.  Don’t you remember?  To Scotland.”

“Yes, but I thought——­” The girl hesitated.

Sir James shrugged his shoulders.

“My dear young lady, I can do nothing more, I fear.  Our clues have all ended in thin air.  You can take my word for it that there is nothing more to be done.  If anything should arise, I shall be glad to advise you in any way I can.”

His words gave Tuppence an extraordinarily desolate feeling.

“I suppose you’re right,” she said.  “Anyway, thank you very much for trying to help us.  Good-bye.”

Julius was bending over the car.  A momentary pity came into Sir James’s keen eyes, as he gazed into the girl’s downcast face.

“Don’t be too disconsolate, Miss Tuppence,” he said in a low voice.  “Remember, holiday-time isn’t always all playtime.  One sometimes manages to put in some work as well.”