99 
Notebook: Page. 
Advantages of bound. 29 
Record. 29 
Notice of fires on private land, necessary for damage suits. 15 
Objections to testimony in court. 79 
Observation: 
Poor, bearing on accuracy of testimony. 48 
Value of, in investigation work.25 
Occupancy trespass. 23 
Occupation, bearing on accuracy of testimony. 48 
Open-mindedness, necessity of. 31 
Opinion, use of in evidence.72,82 
Outline for: 
Preparing memorandum of case. 67 
Investigation report to district forester. 68 
Personal description of suspects.50,55 
Papers, restoring mutilated and burned. 41 
Peace powers: 
Bearing of, on serving warrants. 57,59,63 
State, when forest officers have. 5 
Peremtory challenge of jurors. 74 
Perishable evidence, preserving. 41 
Perjury: 
Federal law on. 8 
Federal law on use of, in interviews. % . 53 
Prosecution for.54,57 
Permits for burning. 14 
Personal description: 
Identification of persons from. 55 
Of suspects.50,55 
Photographs: 
Enlargements from, in court. 38,39,71 
Identification of persons from. 55 
Requirements for use as evidence. 29,71 
Photographing: 
Tracks. 38 
Dim writing. 41 
Picture, mental, of: 
Case, value of. 25,28,43,45 
Testimony, value of. 52 
Pine needles, following tracks in. 34 
Plain clothes work. 56 
Plan of campaign. 30 
Planning the court case. 69 
Plaster of Paris, making casts with.36,37 
Playing clean. 53 
Portland cement, for taking casts of tracks.36,37 
Preliminary: 
Hearings. 73 
Information, value of. 6,26,43,76 
