"This address book was found on a ledge right by the vault door. There seems to be no doubt as to whom it belongs, for the owner’s name in his own handwriting is on the fly-leaf. Mr. Thompson is quite convinced of the ownership of the book, for there are specimens of the same handwriting on file in the bookkeeping department of the bank." "My goodness!" gasped Tobias, staring at the book but refusing to take it from the other’s hand. "This book could not have been on the ledge where it was found at the time the bank closed day before yesterday. The vault door was opened on the combination. And the combination is written on one of the pages of this address book." "Oh, sugar!" murmured Tobias. "Then you’ve just as good as got one of the burglars, ain’t you?" "Oh, no!" gasped Lorna, cowering in the doorway. The men did not appear to notice her agitation. Tobias still smoked calmly. The detective hesitated for a moment before he fairly forced the red memorandum book into the lightkeeper’s hand. "Look at it," he said. "See that name on the front page? Do you know his handwriting?" Lorna dared not look over the lightkeeper’s shoulder. At first glance she had recognized the red-covered notebook. There might have been some doubt regarding the ownership of the penknife; but of the notebook—never! "My soul and body!" The pipe dropped from the lightkeeper’s fingers and was shattered at his feet. He gave this no attention. He was staring, quite fascinated, at the flyleaf of the little book. "Doesn’t the knife belong to the same person?" asked the detective, with sharp insistence. For once Tobias was ready with no reply. He fluttered the leaves of the book with unsteady fingers. The visitor continued: "Mr. Thompson said you would know if anybody did. He says you are a great chum of this fellow’s—that he hangs about the lighthouse here a good deal. "Now, there is no possibility of the book’s having been left there before the vault door during banking hours. That fellow was never inside the cage for any purpose whatsoever." Tobias finally regained his voice. "You don’t mean to say you think he’d be foolish enough to leave this book right in sight if he was one o’ them burglars?" "But I tell you it was found there. And you yourself found the knife under the window. Isn’t that his, too?" "I wouldn’t go so far as to say it was, nor I wouldn’t say it wasn’t," announced the old lightkeeper with emphasis. "But it looks right senseless for him to have left the book there—let’s see where you say he marked down the combination? That looks right silly, too. If he knowed the combination well enough to open the safe, why bother to write it down?" "There it is," said the detective, pointing, and with emphasis. "Those figures in pencil. That is the bank vault combination. Or it was. Of course, it will be changed now." "Yes. I see. Lockin’ the garage door after the tin Lizzie’s been stole," commented Tobias.