The Secret of the Old Mill - Hardy Boys Mystery 003 - Original

The Secret of the Old Mill - Hardy Boys Mystery 003 - OriginalWith two cases in tow, the Hardy boys look to Turner mill for clues. Determined to learn the secret of the old mill, Frank and Joe employ a clever ruse to gain entrance, only to find themselves trapped. How the young detectives extricate themselves from this dangerous situation and unravel mysteries will keep readers tense with suspense! "Drop case or else danger for you and your family." This warning addressed to Fenton Hardy not only alarms the famous investigator and his detective sons, but also puzzles them, because Mr. Hardy is working on more than one case. Which one prompted the threat? When more ominous warnings follow, Frank and Joe suspect there is a link between the counterfeiting case they are investigating and a secret case their father cannot discuss since it involves national security. The key to the solution of both cases appears to be hidden in the old Turner mill, constructed in frontier days but now a gatehouse for Elekton Controls Limited engaged in manufacturing top-secret electronic parts for space missiles. But the Milhouse is occupied by two Elekton employees who are hostile to Frank and Joe and refused to allow the young detectives to question the company's fourteen-year-old messenger boy who unknowingly may be in possession of some vital clues. Determined to learn the secret of the old mill, Frank and Joe employ a clever ruse to gain entrance, only to find themselves trapped in a subterranean passageway. How the young detectives extricate themselves from this dangerous situation and unravel both mysteries will keep the reader tense with suspense. - Flyleaf Determined to learn the secret of the old mill, Frank and Joe employ a clever ruse to gain entrance, only to find themselves trapped. How the young detectives extricate themselves from this dangerous situation and unravel mysteries will keep readers tense with suspense!

Frank and Joe unravel two mysteries, one involving a counterfeiting case and the other concerned with a national security case their father is working on.

The Hardy boys are determined to learn the secret of an old mill and employ a clever ruse to gain entrance. But soon they are trapped. In this adventure, there is danger on two levels for Frank and Joe. First, they confront a nasty gang who will stop at nothing to halt their investigations and second, their father Denton Hardy is on a confidential mission that may deal with sabotage. Will the Hardys unravel the mysteries? A narrow escape Trailing a detective An unexpected return The shadowy visitor The bicycle clue A mysterious tunnel Sleuthing by microscope The strange mill wheel Tracing the slugger The sign of the arrow Sinister tactics An interrupted chase Sudden suspicion Prisoners! Lead to a counterfeiter A night assignment Secret signal The hidden room Underground chase Solid evidence Teenage detectives Frank and Joe Hardy investigate a case of counterfeiting. "WONDER what mystery Dad's working on now?" Joe Hardy asked.