TY - BOOK AU - Dixon,Franklin W. TI - The secret of the old mill T2 - The Hardy Boys mystery stories SN - 0448089033 PY - 1990///, c1962 CY - New York PB - Grosset & Dunlap KW - Edogawa, Ranpo, KW - Mystery and detective stories KW - Counterfeits and counterfeiting KW - National security KW - Boy detectives KW - Fiction KW - Teenage boy detectives KW - Brothers KW - Hardy Boys (Fictitious characters) KW - fast KW - Detective and mystery fiction KW - lcgft N1 - Narrow escape -- Trailing a detective -- Unexpected return -- Shadowy visitor -- Bicycle clue -- Mysterious tunnel -- Sleuthing by microscope -- Strange mill wheel -- Tracing a slugger -- Sign of the arrow -- Sinister tactics -- Interrupted chase -- Sudden suspicion -- Prisoners! -- Lead to a counterfeiter -- Night assignment -- Secret signal -- Hidden room -- Underground chase -- Solid evidence; Fountas & Pinnell; Level T; Grades 4-7; 740L; Lexile; Accelerated reader; 5.5; Accelerated Reader AR; MG; 5.5; 5; 5686 N2 - Teenage detectives Frank and Joe Hardy investigate a cast of counterfeiting in an old millhouse ER -