"here is an advertisement which will interest you," said he. "it appeared in all the papers about a year ago. listen to this: ‘lost, on the 9th inst., mr. jeremiah hayling, aged twenty-six, a hydraulic engineer. left his lodgings at ten o’clock at night, and has not been heard of since. was dressed in,’ etc., etc. ha! that represents the last time that the colonel needed to have his machine overhauled, i fancy."