The economy of travel in the North is sternly simple, and transport's the main difficulty.

You can travel a fixed distance on a fixed quantity of food, and how much you take depends on the skill and number of your packers.
Good men get good wages and money does not go far.

I want to save up as many miles as possible for our prospecting." "I see," said Agatha.

"Yet you stated that you didn't think we would find the lode!" Then she gave him a shrewd glance.

"Aren't you a little impatient to get on now ?" "I am," he admitted, turning to the south.