The Mystery at Putnam Hall: The School Chums’ Strange Discovery by Stratemeyer

This story is complete in itself, but forms the sixth volume in a line issued under the general title of “Putnam Hall Series.”

As mentioned several times, this line was started because many young folks wanted to know what happened at Putnam Hall Military School previous to the arrival at that institution of the Rover boys, as already related in my “Rover Boys Series.”