“State documents!” Mr. Grimm’s lips silently repeated the words.  Then aloud:  “Perhaps there’s a record of the combination somewhere?  If you had died suddenly, for instance, how would the safe have been opened?”

“There would have been only one way, Senor—­blow it open.  There is no record.”

“Well, if we accept all that as true,” observed Mr. Grimm musingly, “it would seem that you either didn’t put the money into the safe at all, or—­please sit down, there’s nothing personal in this—­or else the money was taken out of the safe without it being unlocked.  This last would have been a miracle, and this is not the day of miracles, therefore—!”

Mr. Grimm’s well modulated voice trailed off into silence.  Senor Rodriguez came to his feet with a blaze of anger in his eyes; Mr. Grimm was watching him curiously.

“I understand then, Senor,” said the minister deliberately, “that you believe that I—!”

“I believe that you have told the truth,” interrupted Mr. Grimm placidly, “that is the truth so far as you know it.  But you have stated one thing in error.  Somebody besides yourself does know the combination.  Whether they knew it or not at this time yesterday I can’t say, but somebody knows it now.”

Senor Rodriguez drew a deep breath of relief.  The implied accusation had been withdrawn as pleasantly and frankly as it had been put forward.

“I ran across a chap in New York once, for instance,” Mr. Grimm took the trouble to explain, “who could unlock any safe—­that is, any safe of the kind used at that time—­twelve or fourteen years ago.  So you see.  I doubt if he would be so successful with the new models, with all their improvements, but then—!  You know he would have made an ideal burglar, that chap.  Now, Senor, who lives here in the legation with you?”

“My secretary, Senor Diaz, my daughter Inez, and just at the moment, a Miss Thorne—­Miss Isabel Thorne,” the senor informed him.  “Also four servants—­two men and two women.”

“I’ve had the pleasure of meeting your daughter and Miss Thorne,” Mr. Grimm informed him.  “Now, suppose we take a look at the safe?”

“Certainly.”

Senor Rodriguez started toward the closed door just as there came a timid knock from the hall.  He glanced at Mr. Grimm, who nodded, then he called: 

“Come in!”

The door opened, and Miss Thorne entered.  She was clad in some filmy, gossamer-like morning gown with her radiant hair caught up on her white neck.  At sight of Mr. Grimm the blue-gray eyes opened as if in surprise, and she paused irresolutely.

“I beg your pardon, Senor,” she said, addressing the diplomatist.  “I did not know you were engaged.  And Mr. Grimm!” She extended a slim, white hand, and the young man bowed low over it.  “We are old friends,” she explained, smilingly, to the minister.  Then:  “I think I must have dropped my handkerchief when I was in here yesterday with Inez.  Perhaps you found it?”