HE ENEMY'S COUNTRY.

Observing the heavens. Degrees and what they mean. Angles.
Calculating position by the stars. The moon as a factor by
night. The fixed stars in the moon's path. Determine to
recover the wrecked boat. The boys inaugurate the trip. A
jolly lark. Through the forest. The alarm in the night. The
attack of an animal. Missed. Sighting the West River.
Miscalculation. Discovering their former tracks. In the
savages' country. The chatter of Angel in the trees. The
alarm. Savages. Eluding them. Escaping to the north.
Discovered by the natives. The pursuit.

XI. THE RUSE TO ESCAPE THEIR PURSUERS

Preparing for defense. Appearance of the savages. The charge.
Repelling the attack. Driving the team ahead. Harry and Tom as
rear guards. Harry's injunction to force the team on rapidly.
The warriors. Turning to the east. Eluding the enemy. The rush
for the river. Crossing. The savages at the river.
Reinforcement of the pursuing party. The ruse leaving the
river. Hiding the wagon. Returning to the river. The two
warriors swimming the river. Their surprise. Their effort to
escape. Recognizing the savages as the captors of the boys.
Consternation in the camp of the enemy. Determining to recross
the river. The flight to the north. Recrossing. Return home.

XII. THE PROBLEM ABOUT THE CAVE

Their happy reception at the Cataract. Why their observations
of the moon led them astray. Distinguishing fixed stars. How
Angel fought the savages. Individuality. The chief an enigma.
How he used the grindstone. His interest in machinery. The
yardstick of the heavens to measure degrees. The Constellation
Orion. The new calf. Milk and butter. The mysterious visit of
the chief to the clay banks. Eating clay. Observations by
Ralph and Tom. The clay eaters of the world. The cave and the
treasure. The Professor refuses to take a share of it.
Determination of the boys. Harry and George go to the cave. Go
back for Ralph and Tom.

XIII. THE ACCIDENT TO JOHN AND THE RESTORATION OF MEMORY

An island of abundance. Nuts and vegetables. Oils for
illumination. Unripe fruit. How nature protects her products.
Eggs. How good and bad are determined. Gases formed within the
shell. Building an addition to their home. Putting up the new
building. The accident to Joh