00638cam a2200181 4500 43613127 TxAuBib 19940827120000.0 121016s1976||||||||||||||||||||||||und|u TxAuBib Warner, Gertrude Chandler. Benny uncovers a mystery / Gertrude Warner. Chicago : Albert Whitman, 1976. 128p : ill ; 19cm. Boxcar Children ; 19 Mystery and detective stories. Boxcar Children ; 19.