Here we are simply in the wilds.

The way we are going leads to nowhere and finishes in an utterly uninhabitable jungle." "Think we'd better turn round and try and bisect one of the trade routes ?" Quest suggested.
The Professor shook his head.
"We should never know when we'd struck it.

There are no milestones or telegraph wires.

We shall have to put as brave a face on it as possible, and push on." Laura put her head out of the tent in which the two women had slept.
"Say, where's breakfast ?" she exclaimed.

"I can't smell the coffee." They turned and approached her silently.