“Gladly, captain.  It is a pity that such good friends and neighbors as we have all been must be enemies, is it not?  But it was not our doing.”

Fred frowned a little.

“That sounds rather bad,” he said to himself.  “If this captain has lived near here, he must know a good deal about the place.  And, by George, if they make a search they will find the wireless machinery that Ivan brought in with him!  It may be a mighty bad thing for this house and for Russia that Boris saw me and brought me in, though it was certainly lucky for me!”

But even then Fred did not guess the extent of the trouble he had really caused.  He listened intently, but for a time there was silence beyond the wall.  Then he heard a murmur of voices, and guessed that a report of the search for him was being made.  And then the captain’s voice boomed out.

“Prince,” he said, “I must ask you to come with me and to consider yourself under arrest.  It is very painful but those are my orders.  Colonel Goldapp wishes to see you.  I think it is only a form.”

“What?  You will take me away?” Fred caught the dismay in his cousin’s tone, and winced slightly.  But then he understood that it was not fear for himself that moved Boris, but anxiety lest the important plans of which he was such an essential part should be spoiled.  “But my father—­he thinks that I am safe here until he can make arrangements for me to return to Russia.”

“I am sorry.”  The German’s tone, gruff though it was, was by no means unkindly.  “Orders, however—­I have no choice.  Doubtless you will be allowed to return as soon as the colonel has seen you.”

“Well, there is no use in arguing, of course,” said Boris.  He raised his voice, and Fred understood that what followed was meant especially for his ears.  “Where will you take me, Herr Hauptmann?”

“Colonel Goldapp’s quarters are at present in the parsonage near the village.  You will be examined there, Prince.  We shall be there to-night, at least, perhaps longer.”

“I see.  I will be ready in a few moments.  Will you excuse me if I write some instructions for Vladimir, who will be in charge after I go?  You may, of course, read what I write.”

“Assuredly.”

Then there was silence.  The room outside was so quiet that Fred had a chance to realize how perfectly the place in which he was hidden served its purpose.  He could hear the heavy breathing of someone near the wall.  Then a chair scraped along the floor, and in a moment he heard the scratching of a pen.  And then there came a new sound, a tapping, as with two fingers.  That was Boris, and quite suddenly Fred understood.  Boris was tapping out a message to him in telegraphic code.

“You must take charge here,” Boris tapped with his fingers.  “I will tell Vladimir to get you as soon as it is safe.  The parsonage where I will be taken is very near the outlet of the secret passage.  If Ivan returns, tell him I am there, and that I will sing or whistle the song of the Volga boatmen from time to time, so that he may know the window of my room, if there is no guard in the room with me.  Do not answer, for they might hear.”