_by Capwell Wyckoff_
The mystery of Clanhammer Hall, at Woodcrest Military Academy,
interested Don and Jim Mercer and their friend Terry Mackson from the
moment of their arrival at Woodcrest. But their curiosity about the old,
empty building faded into the back of their minds as they became
involved in the mysterious disappearance of their headmaster, Colonel
Morrell, whom they had never seen. With initiative and ingenuity the
Mercer boys, aided by Cadet Vench, did a little detective work and
uncovered a fantastic story of crime.