Jennie had promised Professor Seigfried not to communicate with the Director of Police, and she now wondered whether it would be breaking her word, or not, if she let that official know the result of her investigation, when it would make no difference, one way or the other, to the Professor. If Professor Seigfried could have foreseen his own sudden death, would he not, she asked herself, have preferred her to make public all she knew of him? for had he not constantly reiterated that fame, and the consequent transmission of his name to posterity, was what he worked for? Then there was this consideration: if the Chief of Police was not told how the explosion had been caused, his fruitless search would go futilely on, and, doubtless, in the course of police inquiry, many innocent persons would be arrested, put to inconvenience and expense, and there was even a chance that one or more, who had absolutely nothing to do with the affair, might be imprisoned for life. She resolved, therefore, to tell the Director of the Police all she knew, which she would not have done had Professor Seigfried been alive. She accordingly sent a messenger for the great official, and just as she had begun to relate to the impatient Princess what had happened, he was announced. The three of them held convention in Jennie’s drawing-room with locked doors. “I am in a position,” began Jennie, “to tell you how the explosion in the Treasury was caused and who caused it; but before doing so you must promise to grant me two favours, each of which is in your power to bestow without inconvenience.” “What are they?” asked the Director of Police cautiously. “To tell what they are is to tell part of my story. You must first promise blindly, and afterwards keep your promise faithfully.” “Those are rather unusual terms, Miss Baxter,” said the Chief; “but I accede to them, the more willingly as we have found that all the gold is still in the Treasury, as you said it was.” “Very well, then, the first favour is that I shall not be called to give testimony when an inquest is held on the body of Professor Carl Seigfried.” “You amaze me!” cried the Director; “how did you know he was dead? I had news of it only a moment before I left my office.” “I was with him when he died,” said Jennie simply, which statement drew forth an exclamation of surprise from both the Princess and the Director. “My next request is that you destroy utterly a machine which stands on a table near the centre of the Professor’s room. Perhaps the instrument is already disabled--I believe it is--but, nevertheless, I shall not rest content until you have seen that every vestige of it is made away with, because the study of what is left of it may enable some other scientist to put it in working order again. I entreat you to attend to this matter yourself. I will go with you, if you wish me to, and point out the instrument in case it has been moved from its position.”