00825    a2200193   4500001000700000020001800007020000900025041000800034082001000042245003500052246003100087490003500118520034400153856002400497040002500521260003700546300001700583700003100600118591  a9780448089034  qenc.  aeng  a[Fic]10aThe Hardy boys mystery stories  aThe secret of the old mill  aThe Hardy boys mystery stories  aWith 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!  u000031/00003149.jpg  aBR-BrIDEAcBR-BrIDEA  aNew YorkbGrosset & Dunlapc1987  a180 p.bill.  aDixon, Franklin W.eauthor