CLARKSVILLE, Tenn. (AP) -- The confiscated writings of a jail inmate in Clarksville led drug agents to a crop of marijuana plants after a deputy realized the inmate had provided detailed directions to several Montgomery County marijuana growing operations.

Deputy Amanda Pierce was looking through a book that an inmate had tried to give to a visitor when she noticed writing inside. Another officer, Sgt. Marty Pierce, realized that the writing was directions where marijuana was being grown in Montgomery County, The Leaf-Chronicle reported.

Lt. Jesse Reynolds, director of the 19th Judicial District Drug Task Force, said his agents studied the directions and were able to find three locations and 32 marijuana plants on Monday.

Reynolds said finding the directions was "like being a little kid and trying to decipher a treasure map."