It was hard to realize that, in the first miles of this brief march, we had been traveling due north, while, on the last few miles of the same march, we had been traveling south, although we had all the time been traveling precisely in the same direction.

It would be difficult to imagine a better illustration of the fact that most things are relative.

Again, please consider the uncommon circumstance that, in order to return to our camp, it now became necessary to turn and go north again for a few miles and then to go directly south, all the time traveling in the same direction.
As we passed back along that trail which none had ever seen before or would ever see again, certain reflections intruded themselves which, I think, may fairly be called unique.

East, west, and north had disappeared for us.

Only one direction remained and that was south.
Every breeze which could possibly blow upon us, no matter from what point of the horizon, must be a south wind.