Now the travellers retired to the main lake and by noon had reached the south end.

At no point had they seen any sign of a cabin, though both sides of the lake were in plain view all day.

The travelling stranger was a mystery, but he did not live here and there was no good reason why they should not settle.
Where?
The country seemed equally good at all points, but it is usually best to camp on an outlet.

Then when a storm comes up, the big waves do not threaten your canoe, or compel you to stay on land.

It is a favourite crossing for animals avoiding the lake, and other trappers coming in are sure to see your cabin before they enter.
Which side of the outlet?
Quonab settled that--the west.