Tom and Grace hearken to warning sounds in the trees. "Quick! Get the girls out!" A rush from an unknown peril. Hippy declares that "Nature is an old fogy." Crashing reverberations are heard in the forest. "Hippy's hurt!" cries Elfreda Briggs. CHAPTER VIII--THEIR FIRST DISASTER............................... 80 Tom informs his companions that their camp has been wiped out. Building a fire in the rain. Overland girls learn the secrets of the forest. Joe Shafto boxes Hippy's ears. The pet bear is welcomed with a club. A startling assertion. CHAPTER IX--LUMBERJACKS SEEK REVENGE............................. 91 "The skidway was tampered with!" Overland tents are destroyed. Tom gets a cold welcome. A warning of timber thieves. Lean-tos are built for the night's camp. "How can we go to bed with one side of the house out?" wonders Emma. Awakened by an explosion. CHAPTER X--MYSTERY IN THE FALL OF A TREE........................ 102 Hippy is assisted down the river bank by a flying tree limb. The camp of the Overlanders again suffers disaster. "Hurry! We've set the woods on fire!" Battling with a forest fire. Hippy wants to dream of food. A disturbing outlook. CHAPTER XI--THE THREAT OF PEG TATEM............................. 115 Henry sleeps on high. The bear and the bull pup scent trouble. The foreman of Section Forty-three goes trouble-hunting. Settlement is demanded of the Overlanders for the burned trees. "Skip! Get out!" orders Lieutenant Wingate. Peg starts a row. CHAPTER XII--A SHOT FROM THE FOREST............................. 121 Tom Gray attacked by the lumberman. The jacks take a hand. Hippy uses a firebrand as a weapon. Overlanders badly punished. Shots from the forest shatter Peg's wooden leg. Henry paws his way into the fight. The Overlanders meet a fresh mystery. CHAPTER XIII--A BLAZED WARNING.................................. 132 Grace Harlowe's party seeks a change of scene. The bent arrow points to danger. The end of a long night's journey through the forest. The mournful wail of a timber wolf carries a meaning to Emma Dean. "Put out that fire!" commands the forest ranger. CHAPTER XIV--THEIR DAY AT HOME.................................. 143 The caller at the Overland camp grows threatening. Henry sounds a warning growl. Ordered to leave the forest. Emma tells the ranger how to get rid of wolves. "I reckon you haven't heard the last of Peg Tatem." CHAPTER XV--THE WAY OF THE BIG WOODS............................ 150 Newcomers arouse the apprehensions of the Overland Riders. "Put up yer hands!" comes the stern command. Deputy sheriffs inform the Overlanders that they are under arrest. Joe Shafto fires a warning shot at their annoying callers.