"Idiot!" exclaimed Ruth, revealing an excellent semblance of rage. "You have relet my rooms?"

"But you may occupy the Herr Hauptman's," burst out the browbeaten Innkeeper.

"And where is Captain von Brenner?"

It all came out at one gush of chattering information. The captain had been sent for by the Herr General Stultz. He had already been away three days. It was whispered he was arrested.

After her first show of annoyance Ruth seemed to recover her self-possession. She listened more quietly to the explanation of the excited hotel man. Then she demanded to be shown to her "brother's" rooms.

There she sat down and wrote quite a long letter to Tom Cameron in the character of his sister, "Mina von Brenner." She was sure Tom would recognize her handwriting and understand at once that she was at Merz in an attempt to aid him.

"Fear not for me, Brother," she wrote in conclusion. "But hasten to assure your Mina that you are perfectly safe. Is it not possible for you to return to the hotel by dinner time? I am distraught for your safety."

She sent this letter, with gold, by the hotel keeper, who said he could find a messenger to go to the Marchand estate. Ruth knew, of course, that her letter would be read there before it was given to Tom.

Even if they questioned him about his sister before giving him the letter Tom would make no mistake. "Mina von Brenner" was already a character and name chosen by Count Allaire and Tom when the latter took up his difficult and dangerous work in the guise of an Uhlan captain.

That was one of the longest days Ruth Fielding had ever spent. As the hours dragged by she sat and pondered in the rooms Tom had occupied, one moment in despair of his coming, the next fearing that every step in the corridor outside her door was that of a guard come to arrest her.